How to Make Learning as Addictive as Social Media | Duolingo's Luis Von Ahn | TED

7,967,410 views ใƒป 2023-10-26

TED


ืื ื ืœื—ืฅ ืคืขืžื™ื™ื ืขืœ ื”ื›ืชื•ื‘ื™ื•ืช ื‘ืื ื’ืœื™ืช ืœืžื˜ื” ื›ื“ื™ ืœื”ืคืขื™ืœ ืืช ื”ืกืจื˜ื•ืŸ.

ืชืจื’ื•ื: Roey Perlstein ืขืจื™ื›ื”: zeeva livshitz
00:04
So, I'm from Guatemala.
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ืื–, ืื ื™ ืžื’ื•ืื˜ืžืœื”.
00:07
This is a public service announcement,
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ื–ื• ื”ื•ื“ืขืช ืฉื™ืจื•ืช ืฆื™ื‘ื•ืจื™,
00:09
that is where Guatemala is.
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ืฉื ื ืžืฆืืช ื’ื•ืื˜ืžืœื”.
00:10
(Laughter)
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(ืฆื—ื•ืง)
00:13
Also, that is not where they keep the prisoners.
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ื•ื’ื, ื–ื” ืœื ื”ืžืงื•ื ืฉื‘ื• ื”ื ืžื—ื–ื™ืงื™ื ืืช ื”ืืกื™ืจื™ื.
00:15
That is called Guantanamo.
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ืงื•ืจืื™ื ืœื–ื” ื’ื•ืื ื˜ื ืžื•.
00:17
(Laughter)
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(ืฆื—ื•ืง)
00:18
Not the same place.
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ืœื ืื•ืชื• ืžืงื•ื.
00:20
So Guatemala's right below Mexico.
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ืื– ื’ื•ืื˜ืžืœื” ื ืžืฆืืช ืžืžืฉ ืžืชื—ืช ืœืžืงืกื™ืงื•.
00:22
And for the Americans in the audience,
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ื•ืขื‘ื•ืจ ื”ืืžืจื™ืงืื™ื ื‘ืงื”ืœ,
00:24
and let this sink in, because it really applies in most ways,
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ื•ืชื ื• ืœื–ื” ืœืฉืงื•ืข ืคื ื™ืžื”, ื›ื™ ื–ื” ื—ืœ ื‘ืจื•ื‘ ื”ืžื•ื‘ื ื™ื,
ืขื‘ื•ืจ ื”ืืžืจื™ืงืื™ื ื‘ืงื”ืœ,
00:27
for the Americans in the audience,
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ืืชื ื™ื›ื•ืœื™ื ืœื—ืฉื•ื‘ ืขืœื™ื” ื‘ืชื•ืจ ืžืงืกื™ืงื• ืฉืœ ืžืงืกื™ืงื•.
00:29
you can think of it as Mexico's Mexico.
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00:31
(Laughter)
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(ืฆื—ื•ืง)
00:33
Just like the US doesn't want illegal immigration from Mexico,
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ื‘ื“ื™ื•ืง ื›ืžื• ืฉืืจื”โ€œื‘ ืœื ืจื•ืฆื” ื”ื’ื™ืจื” ื‘ืœืชื™ ื—ื•ืงื™ืช ืžืžืงืกื™ืงื•,
00:36
Mexico doesn't want illegal immigration from Guatemala.
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ืžืงืกื™ืงื• ืœื ืจื•ืฆื” ื”ื’ื™ืจื” ื‘ืœืชื™ ื—ื•ืงื™ืช ืžื’ื•ืื˜ืžืœื”.
00:39
It's a smaller country.
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ื–ื• ืžื“ื™ื ื” ืงื˜ื ื” ื™ื•ืชืจ.
00:41
It's a poor country.
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ื–ื• ืžื“ื™ื ื” ืขื ื™ื™ื”.
00:43
And well, what can I tell you,
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ื•ื‘ื›ืŸ, ืžื” ืื•ืžืจ ืœื›ื,
00:45
it has much better Mexican food.
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ื™ืฉ ื‘ื” ืื•ื›ืœ ืžืงืกื™ืงื ื™ ื”ืจื‘ื” ื™ื•ืชืจ ื˜ื•ื‘.
00:47
(Laughter)
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(ืฆื—ื•ืง)
00:51
Guatemala is a very poor country.
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ื’ื•ืื˜ืžืœื” ื”ื™ื ืžื“ื™ื ื” ืขื ื™ื™ื” ืžืื•ื“.
00:53
And a lot of people talk about education
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ื•ื”ืจื‘ื” ืื ืฉื™ื ืžื“ื‘ืจื™ื ืขืœ ื—ื™ื ื•ืš
00:56
as something that brings equality to different social classes.
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ื›ืžืฉื”ื• ืฉืžื‘ื™ื ืฉื•ื•ื™ื•ืŸ ืœืžืขืžื“ื•ืช ื—ื‘ืจืชื™ื™ื ืฉื•ื ื™ื.
ืื‘ืœ ืชืžื™ื“ ืจืื™ืชื™ ืืช ื–ื” ื”ืคื•ืš, ื›ืžืฉื”ื• ืฉืžื‘ื™ื ืื™ ืฉื•ื•ื™ื•ืŸ.
00:59
But I always saw it as the opposite, as something that brings inequality.
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01:02
Because what happens in practice
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ื›ื™ ืžื” ืฉืงื•ืจื” ื‘ืคื•ืขืœ ื”ื•ื ืฉืื ืฉื™ื ืฉื™ืฉ ืœื”ื ื”ืจื‘ื” ื›ืกืฃ
01:04
is that people who have a lot of money can buy themselves a really good education
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ื™ื›ื•ืœื™ื ืœืงื ื•ืช ืœืขืฆืžื ื”ืฉื›ืœื” ืžืžืฉ ื˜ื•ื‘ื” ื•ืœื›ืŸ ืœื”ืžืฉื™ืš ืœื”ื—ื–ื™ืง ื‘ื”ืจื‘ื” ื›ืกืฃ.
01:07
and therefore continue having a lot of money.
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ื•ืื™ืœื• ืื ืฉื™ื ืฉืื™ืŸ ืœื”ื ื”ืจื‘ื” ื›ืกืฃ
01:10
Whereas people who don't have very much money
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ื‘ืงื•ืฉื™ ืœื•ืžื“ื™ื ืงืจื•ื ื•ื›ืชื•ื‘ ื•ืืฃ ืคืขื ืœื ื™ืจื•ื•ื™ื—ื• ื”ืจื‘ื” ื›ืกืฃ.
01:12
barely learn how to read and write
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01:13
and therefore never make a lot of money.
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ื•ื–ื” ื ื›ื•ืŸ ื‘ืžื™ื•ื—ื“ ื‘ืžื“ื™ื ื•ืช ืขื ื™ื•ืช.
01:15
And this is especially true in poor countries.
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01:17
Now, I was fortunate that I received a rich person's education
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ืขื›ืฉื™ื•, ื”ืชืžื–ืœ ืžื–ืœื™ ืฉืงื™ื‘ืœืชื™ ื—ื™ื ื•ืš ืฉืœ ืื“ื ืขืฉื™ืจ
01:21
even though I didn't grow up rich.
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ืœืžืจื•ืช ืฉืœื ื’ื“ืœืชื™ ืขืฉื™ืจ.
01:23
And itโ€™s because Iโ€™m an only child.
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ื•ื–ื” ื‘ื’ืœืœ ืฉืื ื™ ื™ืœื“ ื™ื—ื™ื“.
01:25
And my mother, who was a single mother,
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ื•ืืžื™, ืฉื”ื™ื™ืชื” ืื ื—ื“ ื”ื•ืจื™ืช,
01:27
spent all of her resources on my education.
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ื”ื•ืฆื™ืื” ืืช ื›ืœ ื”ืžืฉืื‘ื™ื ืฉืœื” ืขืœ ื”ื—ื™ื ื•ืš ืฉืœื™.
01:30
And this allowed me to come to college to the US
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ื•ื–ื” ืื™ืคืฉืจ ืœื™ ืœืœืžื•ื“ ื‘ืงื•ืœื’โ€ฒ ื‘ืืจื”โ€œื‘
01:33
and eventually get a PhD in computer science.
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ื•ืœื‘ืกื•ืฃ ืœืงื‘ืœ ื“ื•ืงื˜ื•ืจื˜ ื‘ืžื“ืขื™ ื”ืžื—ืฉื‘.
01:36
Now because of all of this
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ืขื›ืฉื™ื• ื‘ื’ืœืœ ื›ืœ ื–ื”
01:39
about 10 years ago,
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ืœืคื ื™ ื›ืขืฉืจ ืฉื ื™ื, ื”ื—ืœื˜ืชื™ ืฉืื ื™ ืจื•ืฆื” ืœืขืฉื•ืช ืžืฉื”ื•
01:41
I decided I wanted to do something
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01:42
that would give equal access to education to everyone.
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ืฉื™ืขื ื™ืง ื’ื™ืฉื” ืฉื•ื•ื” ืœื—ื™ื ื•ืš ืœื›ื•ืœื.
01:46
Oh, by the way, this is what I want to talk to you about today,
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ื“ืจืš ืื’ื‘, ืขืœ ื–ื” ืื ื™ ืจื•ืฆื” ืœื“ื‘ืจ ืื™ืชื›ื ื”ื™ื•ื,
ืœืชืช ื’ื™ืฉื” ืฉื•ื•ื” ืœื—ื™ื ื•ืš ืœื›ื•ืœื.
01:49
giving equal access to education to everyone.
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01:51
At the time, I was a professor of computer science
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ื‘ืื•ืชื” ืชืงื•ืคื” ื”ื™ื™ืชื™ ืคืจื•ืคืกื•ืจ ืœืžื“ืขื™ ื”ืžื—ืฉื‘ ื‘"ืื•ื ื™ื‘ืจืกื™ื˜ืช ืงืจื ื’ื™ ืžืœื•ืŸ",
01:53
at Carnegie Mellon University,
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01:55
and I decided to work on this with my PhD student, Severin.
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ื•ื”ื—ืœื˜ืชื™ ืœืขื‘ื•ื“ ืขืœ ื–ื” ืขื ื”ื“ื•ืงื˜ื•ืจื ื˜ ืฉืœื™, ืกื•ื•ืจื™ืŸ.
02:01
The way my brain works,
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ื”ื“ืจืš ืฉื‘ื” ื”ืžื•ื— ืฉืœื™ ืขื•ื‘ื“,
02:02
all of education is just too general of a problem.
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ื›ืœ ื”ื—ื™ื ื•ืš ื”ื•ื ืคืฉื•ื˜ ื‘ืขื™ื” ื›ืœืœื™ืช ืžื“ื™.
02:05
So I decided, let's start by teaching one thing.
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ืื– ื”ื—ืœื˜ืชื™, ื‘ื•ืื• ื ืชื—ื™ืœ ืžืœืœืžื“ ื“ื‘ืจ ืื—ื“.
02:08
And then I started thinking, OK, well, what should we teach first?
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ื•ืื– ื”ืชื—ืœืชื™ ืœื—ืฉื•ื‘, ืื• ืงื™ื™, ื˜ื•ื‘, ืžื” ืขืœื™ื ื• ืœืœืžื“ ืงื•ื“ื?
ื”ืื ืขืœื™ื ื• ืœืœืžื“ ืžืชืžื˜ื™ืงื”? ื›ืœื•ืžืจ, ืฉื ื™ื ื• ืื•ื”ื‘ื™ื ืžืชืžื˜ื™ืงื”.
02:12
Should we teach math?
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02:13
I mean, we both love math.
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02:14
Me and my cofounder, we both love math.
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ืื ื™ ื•ื”ืžื™ื™ืกื“ ื”ืžืฉื•ืชืฃ ืฉืœื™, ืฉื ื™ื ื• ืื•ื”ื‘ื™ื ืžืชืžื˜ื™ืงื”.
02:16
And, you know, we didn't decide to do math.
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ื•ืืชื ื™ื•ื“ืขื™ื, ืœื ื”ื—ืœื˜ื ื• ืœืขืฉื•ืช ืžืชืžื˜ื™ืงื”.
02:19
Then we started thinking, well, maybe we should teach computer science.
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ื•ืื– ื”ืชื—ืœื ื• ืœื—ืฉื•ื‘, ื˜ื•ื‘, ืื•ืœื™ ื›ื“ืื™ ืฉื ืœืžื“ ืžื“ืขื™ ื”ืžื—ืฉื‘.
ืื‘ืœ ื‘ืกื•ืคื• ืฉืœ ื“ื‘ืจ, ื•ื–ื” ืื•ืœื™ ืžืคืชื™ืข ืื ืฉื™ื ื‘ืฆืคื•ืŸ ืืžืจื™ืงื”,
02:23
But eventually, and this is maybe surprising to people in North America,
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02:26
eventually, we decided that the best subject to start with
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ื‘ืกื•ืคื• ืฉืœ ื“ื‘ืจ, ื”ื—ืœื˜ื ื• ืฉื”ื ื•ืฉื ื”ื˜ื•ื‘ ื‘ื™ื•ืชืจ ืœื”ืชื—ื™ืœ ืื™ืชื• ื”ื•ื ืœื™ืžื•ื“ ืฉืคื•ืช ื–ืจื•ืช.
02:29
was teaching foreign languages.
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02:31
And let me tell you why.
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ื•ืชื ื• ืœื™ ืœื•ืžืจ ืœื›ื ืœืžื”. ื™ืฉื ืŸ ืžืกืคืจ ืกื™ื‘ื•ืช.
02:33
There's a number of reasons.
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02:35
One of them is that there's a huge audience for it.
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ืื—ืช ืžื”ืŸ ื”ื™ื ืฉื™ืฉ ืœื–ื” ืงื”ืœ ืขืฆื•ื.
02:37
Thereโ€™s about two billion people in the world learning a foreign language,
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ื™ืฉื ื ื›ืฉื ื™ ืžื™ืœื™ืืจื“ ืื ืฉื™ื ื‘ืขื•ืœื ื”ืœื•ืžื“ื™ื ืฉืคื” ื–ืจื”,
ื”ืŸ ื‘ื‘ื™ืช ื”ืกืคืจ ื•ื”ืŸ ืžื—ื•ืฅ ืœื‘ืชื™ ื”ืกืคืจ.
02:41
both in school and outside of schools.
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02:43
Most of these people, by the way, are learning English.
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ืจื•ื‘ ื”ืื ืฉื™ื ื”ืืœื”, ืื’ื‘, ืœื•ืžื“ื™ื ืื ื’ืœื™ืช.
02:45
About 80 percent of them are learning English.
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ื›-80% ืžืชื•ื›ื ืœื•ืžื“ื™ื ืื ื’ืœื™ืช.
02:47
In this weird map right here,
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ื‘ืžืคื” ื”ืžื•ื–ืจื” ื”ื–ื• ืžืžืฉ ื›ืืŸ, ื›ืœ ื”ืžื“ื™ื ื•ืช ื‘ื™ืจื•ืง
02:49
all the countries in green
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02:50
are countries in which people are predominantly learning English.
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ื”ืŸ ืžื“ื™ื ื•ืช ืฉื‘ื”ืŸ ืื ืฉื™ื ืœื•ืžื“ื™ื ื‘ืขื™ืงืจ ืื ื’ืœื™ืช.
02:53
And the reason for that
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ื•ื”ืกื™ื‘ื” ืœื›ืš ื”ื™ื ืฉืื ื’ืœื™ืช ื‘ืืžืช ื™ื›ื•ืœื” ืœืฉื ื•ืช ืืช ื—ื™ื™ื›ื.
02:54
is because English can truly transform your life.
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02:57
In most countries in the world,
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ื‘ืจื•ื‘ ื”ืžื“ื™ื ื•ืช ื‘ืขื•ืœื, ื™ื“ืข ื‘ืื ื’ืœื™ืช ื™ื›ื•ืœ ืœื”ื’ื“ื™ืœ ืžืฉืžืขื•ืชื™ืช ืืช ืคื•ื˜ื ืฆื™ืืœ ื”ื”ื›ื ืกื” ืฉืœื›ื.
02:58
knowledge of English can significantly increase your income potential.
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03:02
So this is another reason why we decided to start with foreign languages.
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ืื– ื–ื• ืกื™ื‘ื” ื ื•ืกืคืช ืžื“ื•ืข ื”ื—ืœื˜ื ื• ืœื”ืชื—ื™ืœ ื‘ืฉืคื•ืช ื–ืจื•ืช.
03:05
And it's because you can directly make more money
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ื•ื–ื” ื‘ื’ืœืœ ืฉืืชื ื™ื›ื•ืœื™ื ื™ืฉื™ืจื•ืช ืœื”ืจื•ื•ื™ื— ื™ื•ืชืจ ื›ืกืฃ
ืื ืืชื ืœื•ืžื“ื™ื ืฉืคื” ืื—ืจืช, ื‘ืžื™ื•ื—ื“ ืื ื’ืœื™ืช.
03:08
if you learn another language, in particular English.
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ื•ืืชื ืžื‘ื™ื ื™ื, ื–ื” ื“ื™ ืฉื•ื ื” ืžื ื•ืฉืื™ื ืจื‘ื™ื ืื—ืจื™ื.
03:10
And see, this is pretty different than many other subjects.
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ืœื“ื•ื’ืžื”, ืงื—ื• ืืช ื”ืžืชืžื˜ื™ืงื”.
03:13
For example, take math.
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ื‘ืžืงืจื” ืฉืœ ืžืชืžื˜ื™ืงื”, ืจืง ื™ื“ืข ื‘ืžืชืžื˜ื™ืงื”
03:14
In the case of math,
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03:15
just knowledge of math does not increase your income potential
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ืœื ืžื’ื“ื™ืœ ืืช ืคื•ื˜ื ืฆื™ืืœ ื”ื”ื›ื ืกื” ืฉืœื›ื
ืžื›ื™ื•ื•ืŸ ืฉื‘ื“ืจืš ื›ืœืœ ืฆืจื™ืš ืœืœืžื•ื“ ืžืชืžื˜ื™ืงื” ื›ื“ื™ ืœืœืžื•ื“ ืื—ืจ-ื›ืš ืคื™ื–ื™ืงื”
03:18
because usually you have to learn math to then learn physics
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ื›ื“ื™ ืœื”ืคื•ืš ืื– ืœืžื”ื ื“ืก ืื–ืจื—ื™, ื›ืš ืืชื ืžืจื•ื•ื™ื—ื™ื ื™ื•ืชืจ ื›ืกืฃ.
03:21
to then become a civil engineer, that's how you make more money.
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ื•ืื™ืœื• ื‘ืฉืคื•ืช, ืื ืืชื” ืžืœืฆืจ ื•ืืชื” ืœื•ืžื“ ืื ื’ืœื™ืช,
03:24
Whereas with languages, if you are a waiter and you learn English,
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03:27
now you can be a waiter at a hotel and make more money.
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ืขื›ืฉื™ื• ืืชื” ื™ื›ื•ืœ ืœื”ื™ื•ืช ืžืœืฆืจ ื‘ืžืœื•ืŸ ื•ืœื”ืจื•ื•ื™ื— ื™ื•ืชืจ ื›ืกืฃ.
03:30
So we decided, well, let's get started by teaching languages.
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ืื– ื”ื—ืœื˜ื ื•, ื•ื‘ื›ืŸ, ื‘ื•ืื• ื ืชื—ื™ืœ ืžื”ื•ืจืืช ืฉืคื•ืช.
03:34
Now, we also convinced ourselves
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ืขื›ืฉื™ื•, ื’ื ืฉื›ื ืขื ื• ืืช ืขืฆืžื ื•
03:36
that the only way to really reach a lot of people
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ืฉื”ื“ืจืš ื”ื™ื—ื™ื“ื” ื‘ืืžืช ืœื”ื’ื™ืข ืœื”ืจื‘ื” ืื ืฉื™ื
03:40
was by using a mobile phone, or a smartphone in particular.
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ื”ื™ื ื‘ืืžืฆืขื•ืช ื˜ืœืคื•ืŸ ื ื™ื™ื“, ืื• ืกืžืืจื˜ืคื•ืŸ ื‘ืคืจื˜.
03:44
See, building schools all over the world is simply too expensive.
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ืžื‘ื™ื ื™ื, ื‘ื ื™ื™ืช ื‘ืชื™ ืกืคืจ ื‘ื›ืœ ื”ืขื•ืœื ื”ื™ื ืคืฉื•ื˜ ื™ืงืจื” ืžื“ื™.
03:47
On the other hand,
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ืžืฆื“ ืฉื ื™,
03:49
most of the world's population already has access to a smartphone,
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ืœืจื•ื‘ ืื•ื›ืœื•ืกื™ื™ืช ื”ืขื•ืœื ื›ื‘ืจ ื™ืฉ ื’ื™ืฉื” ืœืกืžืืจื˜ืคื•ืŸ,
ื•ื”ืžื’ืžื” ื”ื™ื ืฉื—ืœืง ื–ื” ืจืง ื”ื•ืœืš ืœื’ื“ื•ืœ.
03:52
and the trend is that that fraction is only going to increase.
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ืื– ื”ื—ืœื˜ื ื• ื‘ื–ืžื ื• ืฉืื ื—ื ื• ื ื™ืฆื•ืจ ื“ืจืš ืœืœืžื•ื“ ืฉืคื•ืช ื–ืจื•ืช ื‘ื˜ืœืคื•ืŸ ื ื™ื™ื“
03:55
So we decided at the time
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03:56
that we would make a way to learn foreign languages on a mobile phone
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04:00
that was accessible to everyone.
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ืฉืชื”ื™ื” ื ื’ื™ืฉื” ืœื›ื•ืœื.
04:02
And then we called it Duolingo.
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ื•ืื– ืงืจืื ื• ืœื–ื” "ื“ื•ืื•ืœื™ื ื’ื•".
04:04
Thank you.
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ืชื•ื“ื” ืœื›ื.
(ืžื—ื™ืื•ืช ื›ืคื™ื™ื)
04:06
(Applause)
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04:09
Now in order to truly be accessible to everyone, rich and poor,
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ืขื›ืฉื™ื• ื›ื“ื™ ืœื”ื™ื•ืช ื‘ืืžืช ื ื’ื™ืฉ ืœื›ื•ืœื, ืขืฉื™ืจื™ื ื•ืขื ื™ื™ื,
04:13
Duolingo uses a freemium model to support itself.
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ื“ื•ืื•ืœื™ื ื’ื• ืžืฉืชืžืฉ ื‘ืžื•ื“ืœ Freemium ื›ื“ื™ ืœืชืžื•ืš ื‘ืขืฆืžื•.
04:16
What that means is that you can learn as much as you want
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ืžื” ืฉื–ื” ืื•ืžืจ ื”ื•ื ืฉืืชื ื™ื›ื•ืœื™ื ืœืœืžื•ื“ ื›ืžื” ืฉืืชื ืจื•ืฆื™ื
04:20
without ever having to pay.
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ืžื‘ืœื™ ืฉืชืฆื˜ืจื›ื• ืœืฉืœื.
04:22
But if you don't pay,
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ืื‘ืœ ืื ืืชื ืœื ืžืฉืœืžื™ื, ื™ื™ืชื›ืŸ ืฉืชืฆื˜ืจืš ืœืจืื•ืช ืžื•ื“ืขื” ื‘ืกื•ืฃ ื”ืฉื™ืขื•ืจ.
04:23
you may have to see an ad at the end of a lesson.
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04:25
Now, if you don't like ads,
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ืื ืืชื ืœื ืื•ื”ื‘ื™ื ืžื•ื“ืขื•ืช,
ืืชื” ื™ื›ื•ืœ ื’ื ืœืฉืœื ื›ื“ื™ ืœื”ื™ืจืฉื ื•ืœื›ื‘ื•ืช ืืช ื”ืžื•ื“ืขื•ืช.
04:27
you can also pay to subscribe to turn off the ads.
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04:30
And it turns out that the vast majority of the revenue for Duolingo
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ื•ืžืชื‘ืจืจ ืฉื”ืจื•ื‘ ื”ืžื›ืจื™ืข ืฉืœ ื”ื”ื›ื ืกื•ืช ืขื‘ื•ืจ ื“ื•ืื•ืœื™ื ื’ื•
04:33
comes from people who pay to subscribe to turn off the ads.
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ืžื’ื™ืข ืžืื ืฉื™ื ืฉืžืฉืœืžื™ื ื›ื“ื™ ืœื”ื™ืจืฉื ื•ืœื›ื‘ื•ืช ืืช ื”ืžื•ื“ืขื•ืช.
04:38
Now, who are these people who pay to subscribe to turn off the ads?
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ืขื›ืฉื™ื•, ืžื™ ื”ืื ืฉื™ื ื”ืืœื” ืฉืžืฉืœืžื™ื ื›ื“ื™ ืœื”ื™ืจืฉื ื•ืœื›ื‘ื•ืช ืืช ื”ืžื•ื“ืขื•ืช?
04:41
Well, they're usually well-off people in rich countries like the US and Canada.
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ื•ื‘ื›ืŸ, ื”ื ื‘ื“ืจืš ื›ืœืœ ืื ืฉื™ื ืืžื™ื“ื™ื ื‘ืžื“ื™ื ื•ืช ืขืฉื™ืจื•ืช ื›ืžื• ืืจื”"ื‘ ื•ืงื ื“ื”.
04:47
Who are the people who don't pay to subscribe?
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ืžื™ื”ื ื”ืื ืฉื™ื ืฉืœื ืžืฉืœืžื™ื ื›ื“ื™ ืœื”ื™ืจืฉื?
04:49
They usually come from poorer countries like Brazil or Vietnam or Guatemala.
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ื”ื ื‘ื“ืจืš ื›ืœืœ ืžื’ื™ืขื™ื ืžืžื“ื™ื ื•ืช ืขื ื™ื•ืช ื™ื•ืชืจ ื›ืžื• ื‘ืจื–ื™ืœ ืื• ื•ื™ื™ื˜ื ืื ืื• ื’ื•ืื˜ืžืœื”.
04:53
So what I like about this model
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ืื– ืžื” ืฉืื ื™ ืื•ื”ื‘ ื‘ืžื•ื“ืœ ื”ื–ื” ื”ื•ื, ืฉื–ื• ืฆื•ืจื” ืงื˜ื ื” ืฉืœ ื—ืœื•ืงื” ืžื—ื“ืฉ ืฉืœ ืขื•ืฉืจ
04:55
is that it is a small form of wealth redistribution
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04:57
because we're basically getting the rich people
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ื›ื™ ืื ื—ื ื• ื‘ืขืฆื ื’ื•ืจืžื™ื ืœืื ืฉื™ื ื”ืขืฉื™ืจื™ื ืœืฉืœื ืขื‘ื•ืจ ื”ื—ื™ื ื•ืš ืฉืœ ื›ื•ืœื.
05:00
to pay for the education of everyone.
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ืื– ืื ื™ ืื•ื”ื‘ ืืช ื–ื”.
05:02
So I like that.
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(ืžื—ื™ืื•ืช ื›ืคื™ื™ื) -ื›ืŸ.
05:03
(Applause)
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05:06
So with smartphones, we can reach a lot of people
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ืื– ื ื”ื“ืจ. ืขื ื˜ืœืคื•ื ื™ื ื—ื›ืžื™ื, ืืคืฉืจ ืœื”ื’ื™ืข ืœื”ืจื‘ื” ืื ืฉื™ื
05:09
and we can even get the rich people to pay for the whole thing,
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ื•ืืคื™ืœื• ืœื’ืจื•ื ืœืื ืฉื™ื ื”ืขืฉื™ืจื™ื ืœืฉืœื ืขืœ ื›ืœ ื”ืขื ื™ื™ืŸ,
ื•ื–ื” ื ื”ื“ืจ. ืขื ื–ืืช,
05:12
which is great.
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05:13
However, if you're trying to deliver education with a smartphone,
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ืื ืืชื ืžื ืกื™ื ืœืกืคืง ื—ื™ื ื•ืš ื‘ืืžืฆืขื•ืช ืกืžืืจื˜ืคื•ืŸ, ืืชื ื ืชืงืœื™ื ื‘ื‘ืขื™ื” ืขื ืงื™ืช.
05:16
you run into a humongous problem.
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05:18
And it is that smartphones come equipped
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ื•ื–ื” ืฉื”ืกืžืืจื˜ืคื•ื ื™ื ืžื’ื™ืขื™ื ืžืฆื•ื™ื“ื™ื
05:20
with some of the most addictive drugs that humanity has ever engineered.
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ื‘ื›ืžื” ืžื”ืกืžื™ื ื”ืžืžื›ืจื™ื ื‘ื™ื•ืชืจ ืฉื”ืื ื•ืฉื•ืช ื”ื™ื ื“ืกื” ืื™ ืคืขื.
05:24
TikTok, Instagram, mobile games.
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TikTok, ืื™ื ืกื˜ื’ืจื, ืžืฉื—ืงื™ื ื ื™ื™ื“ื™ื.
05:27
See, delivering education over a smartphone
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ืืชื ืžื‘ื™ื ื™ื, ืœืกืคืง ื—ื™ื ื•ืš ื‘ืืžืฆืขื•ืช ืกืžืืจื˜ืคื•ืŸ
05:29
is like hoping that people will eat their broccoli,
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ื–ื” ื›ืžื• ืœืงื•ื•ืช ืฉืื ืฉื™ื ื™ืื›ืœื• ืืช ื”ื‘ืจื•ืงื•ืœื™ ืฉืœื”ื,
05:32
but right next to it, you put the most delicious dessert ever made.
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ืื‘ืœ ืžืžืฉ ืœื™ื“ื•, ืฉืžื™ื ืืช ื”ืงื™ื ื•ื— ื”ื›ื™ ื˜ืขื™ื ืฉื”ื•ื›ืŸ ืื™ ืคืขื.
05:35
(Laughter)
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(ืฆื—ื•ืง)
05:38
If you really want to deliver education to everyone,
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ืื ืืชื ื‘ืืžืช ืจื•ืฆื™ื ืœืกืคืง ื—ื™ื ื•ืš ืœื›ื•ืœื,
05:40
not only do you have to make it accessible,
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ืœื ืจืง ืฉืืชื ืฆืจื™ื›ื™ื ืœื”ื ื’ื™ืฉ ืื•ืชื•,
05:42
but also you have to make it so that people want to actually learn.
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ืืœื ื’ื ืœืขืฉื•ืช ืืช ื–ื” ื›ืš ืฉืื ืฉื™ื ื™ืจืฆื• ืœืœืžื•ื“ ื‘ืคื•ืขืœ.
05:46
And with Duolingo, we've been able to do this.
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ื•ืขื ื“ื•ืื•ืœื™ื ื’ื•, ื”ืฆืœื—ื ื• ืœืขืฉื•ืช ืืช ื–ื”.
05:48
And at the highest level, the way we've done this
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ื•ื‘ืจืžื” ื”ื’ื‘ื•ื”ื” ื‘ื™ื•ืชืจ, ื”ื“ืจืš ื‘ื” ืขืฉื™ื ื• ื–ืืช ื”ื™ื ืœื’ืจื•ื
05:51
is by making the broccoli taste like dessert.
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ืœื‘ืจื•ืงื•ืœื™ ืœื”ืคื•ืš ืœื˜ืขื™ื ื›ืžื• ืงื™ื ื•ื—.
05:55
I'll say it another way.
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ืื ื™ ืื’ื™ื“ ืืช ื–ื” ื‘ื“ืจืš ืื—ืจืช. ืžื” ืฉืขืฉื™ื ื• ื–ื” ืœื”ืฉืชืžืฉ ื‘ืื•ืชืŸ ื˜ื›ื ื™ืงื•ืช ืคืกื™ื›ื•ืœื•ื’ื™ื•ืช
05:56
What we've done is that we've used the same psychological techniques
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05:59
that apps like Instagram, TikTok or mobile games use
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ื‘ื”ืŸ ืžืฉืชืžืฉื•ืช ืืคืœื™ืงืฆื™ื•ืช ื›ืžื• ืื™ื ืกื˜ื’ืจื, TikTok ืื• ืžืฉื—ืงื™ื ื ื™ื™ื“ื™ื
ื›ื“ื™ ืœื”ืฉืื™ืจ ืื ืฉื™ื ืžืขื•ืจื‘ื™ื,
06:04
to keep people engaged,
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06:05
but in this case, we use them to keep people engaged
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ืื‘ืœ ื‘ืžืงืจื” ื–ื”, ืื ื• ืžืฉืชืžืฉื™ื ื‘ื”ืŸ ื›ื“ื™ ืœื”ืฉืื™ืจ ืื ืฉื™ื ืžืขื•ืจื‘ื™ื, ืจืง ืขื ื—ื™ื ื•ืš.
06:07
but with education.
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06:09
Let me give you some examples of these techniques.
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ื”ืจืฉื• ืœื™ ืœืชืช ืœื›ื ื›ืžื” ื“ื•ื’ืžืื•ืช ืœื˜ื›ื ื™ืงื•ืช ื”ืœืœื•. ืื—ืช ื”ื—ื–ืงื•ืช ืฉื‘ื”ืŸ ื”ื™ื ื”ืจืขื™ื•ืŸ ืฉืœ ืจืฆืฃ.
06:11
One of the most powerful ones is the notion of a streak.
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06:14
What a streak is, is itโ€™s just a counter
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ืจืฆืฃ ื”ื•ื ืคืฉื•ื˜ ืžื•ื ื”, ืฉืžื•ื“ื“ ืืช ืžืกืคืจ ื”ื™ืžื™ื ื‘ื”ื ื”ืฉืชืžืฉืชื ื‘ืžื•ืฆืจ ื‘ืจืฆื™ืคื•ืช.
06:16
that measures the number of days
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06:18
that you've used the product consecutively.
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06:21
You just take that number,
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ืืชื ืคืฉื•ื˜ ืœื•ืงื—ื™ื ืืช ื”ืžืกืคืจ ื”ื–ื”, ืฉืžื™ื ืื•ืชื• ื‘ืฆื•ืจื” ื‘ื•ืœื˜ืช ืžืื•ื“ ื‘ืžื•ืฆืจ ืฉืœื›ื
06:22
you put it very prominently in your product
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06:24
and then people come back every day.
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ื•ืื– ืื ืฉื™ื ื—ื•ื–ืจื™ื ื›ืœ ื™ื•ื.
06:27
And the reason people come back every day is because, well,
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ื•ื”ืกื™ื‘ื” ืฉืื ืฉื™ื ื—ื•ื–ืจื™ื ื›ืœ ื™ื•ื ื”ื™ื ื›ื™, ื•ื‘ื›ืŸ,
06:30
if they don't come back, that number resets to zero
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ืื ื”ื ืœื ื™ื—ื–ืจื•, ื”ืžืกืคืจ ื”ื–ื” ื™ืชืืคืก ืœืืคืก
ื•ืื ืฉื™ื ืœื ืจื•ืฆื™ื ืœืื‘ื“ ืืช ื”ืจืฆืฃ ืฉืœื”ื.
06:33
and people don't want to lose their streak.
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06:35
It works.
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ื–ื” ืขื•ื‘ื“.
06:37
Now, on the one side,
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ื›ืขืช, ืžืฆื“ ืื—ื“, ืจืฆืคื™ื ื–ื›ื• ืœื‘ื™ืงื•ืจืช
06:38
streaks have been criticized for, for example,
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ืขืœ ื›ืš, ืœืžืฉืœ, ืฉื’ืจืžื• ืœื‘ื ื™ ื ื•ืขืจ ืœื”ืชืžื›ืจ ืœืกื ืืคืฆโ€™ืื˜.
06:42
getting teens addicted to Snapchat.
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06:44
But in the case of an educational app,
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ืื‘ืœ ื‘ืžืงืจื” ืฉืœ ืืคืœื™ืงืฆื™ื” ื—ื™ื ื•ื›ื™ืช
06:47
streaks get people to come back to study every day.
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ืจืฆืคื™ื ื’ื•ืจืžื™ื ืœืื ืฉื™ื ืœื—ื–ื•ืจ ืœืœืžื•ื“ ื›ืœ ื™ื•ื.
06:50
Now, to give you an idea of the power of streaks,
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ืขื›ืฉื™ื•, ืœืชืช ืœื›ื ืžื•ืฉื’ ืขืœ ื›ื•ื—ื ืฉืœ ืจืฆืคื™ื, ื‘ืžืงืจื” ืฉืœ ื“ื•ืื•ืœื™ื ื’ื•
06:52
in the case of Duolingo,
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ื™ืฉ ืœื ื• ืœืžืขืœื” ืžืฉืœื•ืฉื” ืžื™ืœื™ื•ืŸ ืžืฉืชืžืฉื™ื ืคืขื™ืœื™ื ื™ื•ืžื™ื™ื
06:53
we have over three million daily active users
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06:55
that have a streak longer than 365.
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ืฉื™ืฉ ืœื”ื ืจืฆืฃ ืืจื•ืš ืž- 365.
06:58
(Applause)
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(ืžื—ื™ืื•ืช ื›ืคื™ื™ื)
07:02
That means they haven't missed a day in the last year or longer.
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ื–ื” ืื•ืžืจ ืฉื”ื ืœื ื”ื—ืžื™ืฆื• ืืฃ ื™ื•ื ื‘ืฉื ื” ื”ืื—ืจื•ื ื” ืื• ื™ื•ืชืจ.
07:05
Now, fun fact about streaks.
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ืขื›ืฉื™ื•, ืขื•ื‘ื“ื” ืžื”ื ื” ืขืœ ืจืฆืคื™ื.
07:07
What country do you think has the longest average streaks
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ื‘ืื™ื–ื• ืžื“ื™ื ื” ื™ืฉ ืœื“ืขืชื›ื ืืช ื”ืจืฆืคื™ื ื”ืžืžื•ืฆืขื™ื ื”ืืจื•ื›ื™ื ื‘ื™ื•ืชืจ ืขื‘ื•ืจ ืืคืœื™ืงืฆื™ื” ื—ื™ื ื•ื›ื™ืช?
07:11
for an educational app?
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07:13
It's Japan.
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ื–ืืช ื™ืคืŸ.
07:15
Of course.
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(ืฆื—ื•ืง) -ื›ืžื•ื‘ืŸ.
07:17
Shortest-ever streaks?
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ื”ืจืฆืคื™ื ื”ืงืฆืจื™ื ื‘ื™ื•ืชืจ ืื™ ืคืขื?
07:19
Latin America, baby.
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ืืžืจื™ืงื” ื”ืœื˜ื™ื ื™ืช, ืžื•ืชืง.
07:21
(Laughter)
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(ืฆื—ื•ืง)
07:22
But we're fun, hey, we're fun.
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ืื‘ืœ ืื ื—ื ื• ืžื”ื ื™ื, ื”ื™ื™, ืื ื—ื ื• ืžื”ื ื™ื.
07:24
(Laughter)
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(ืฆื—ื•ืง)
07:26
Another important mechanism to get people to come back to your product
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ืžื ื’ื ื•ืŸ ื—ืฉื•ื‘ ื ื•ืกืฃ ืœื’ืจื•ื ืœืื ืฉื™ื ืœื—ื–ื•ืจ ืœืžื•ืฆืจ ืฉืœื›ื ื”ื•ื ื”ืชืจืื•ืช.
07:30
are notifications.
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07:31
On the one side, notifications can be really spammy and annoying,
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ืžืฆื“ ืื—ื“, ื”ืชืจืื•ืช ื™ื›ื•ืœื•ืช ืœื”ื™ื•ืช ืžืžืฉ ืกืคืืžื™ื•ืช ื•ืžืขืฆื‘ื ื•ืช,
07:34
but in the case of an educational product,
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ืืš ื‘ืžืงืจื” ืฉืœ ืžื•ืฆืจ ื—ื™ื ื•ื›ื™, ืื ืฉื™ื ื‘ืขืฆื ืจื•ืฆื™ื ืฉื™ื–ื›ื™ืจื• ืœื”ื ืœืœืžื•ื“.
07:36
people actually want to be reminded to learn.
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07:38
In the case of Duolingo, we have a very sophisticated AI system
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ื‘ืžืงืจื” ืฉืœ ื“ื•ืื•ืœื™ื ื’ื•, ื™ืฉ ืœื ื• ืžืขืจื›ืช AI ืžืชื•ื—ื›ืžืช ืžืื•ื“
07:42
that basically chooses when to send the notification
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ืฉื‘ืขืฆื ื‘ื•ื—ืจืช ืžืชื™ ืœืฉืœื•ื— ืืช ื”ื”ื•ื“ืขื” ื•ื’ื ืžื” ืœื•ืžืจ ื‘ื›ืœ ื”ื•ื“ืขื”
07:46
and also what to say in each notification
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07:48
to maximize the probability that people come back.
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ื›ื“ื™ ืœืžืงืกื ืืช ื”ื”ืกืชื‘ืจื•ืช ืฉืื ืฉื™ื ื™ื—ื–ืจื•.
07:51
Now, interestingly,
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ืขื›ืฉื™ื•, ื‘ืื•ืคืŸ ืžืขื ื™ื™ืŸ, ื’ื ืื—ืจื™ ื›ืœ ื”ืชื—ื›ื•ื ื”ื–ื”,
07:53
even after all this sophistication,
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07:55
it turns out that the algorithm for choosing what time
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ืžืชื‘ืจืจ ื›ื™ ื”ืืœื’ื•ืจื™ืชื ืœื‘ื—ื™ืจืช ื”ื–ืžืŸ ืœืฉืœื•ื— ืœื›ื ืชื–ื›ื•ืจืช ื”ื•ื ื“ื™ ืคืฉื•ื˜.
07:58
to send you a notification is pretty simple.
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08:00
Do you know what is the best time to send people a notification?
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ื™ื•ื“ืขื™ื ืžื” ื”ื–ืžืŸ ื”ื˜ื•ื‘ ื‘ื™ื•ืชืจ ืœืฉืœื•ื— ืœืื ืฉื™ื ื”ื•ื“ืขื”?
ืื ื™ ืื’ื™ื“ ืœื›ื. ื–ื” 24 ืฉืขื•ืช ืœืื—ืจ ืฉื”ื ื”ืฉืชืžืฉื• ื‘ืžื•ืฆืจ ืœืื—ืจื•ื ื”.
08:03
I'll tell you.
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08:04
It's 24 hours after they used the product last.
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08:06
There's an easy explanation.
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ื›ื™... ื™ืฉ ื”ืกื‘ืจ ืงืœ.
08:08
If you were free yesterday at 3pm,
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ืื ื”ื™ื™ืช ืคื ื•ื™ ืืชืžื•ืœ ื‘ืฉืขื” 15:00,
08:10
youโ€™re probably free today at 3pm as well.
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ืืชื” ื›ื ืจืื” ืคื ื•ื™ ื’ื ื”ื™ื•ื ื‘ืฉืขื” 15:00.
08:13
So this is what a very sophisticated millions of dollars of AI found.
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ืื– ื–ื” ืžื” ืฉืžืฆืื” ื‘ื™ื ื” ืžืœืื›ื•ืชื™ืช ืžืชื•ื—ื›ืžืช ืžืื•ื“ ื‘ืฉื•ื•ื™ ืžื™ืœื™ื•ื ื™ ื“ื•ืœืจื™ื.
08:16
(Laughter)
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(ืฆื—ื•ืง)
08:19
It's funny.
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ื–ื” ืžืฆื—ื™ืง.
08:20
Now with notifications you shouldn't be spamming.
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ืขื›ืฉื™ื•, ืขื ื”ืชืจืื•ืช ืืชื ืœื ืฆืจื™ื›ื™ื ืœืฉืœื•ื— ื“ื•ืืจ ื–ื‘ืœ.
08:23
And we're not spamming, with Duolingo,
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ืื ื—ื ื• ืœื ืžืกืคื™ืžื™ื. ื‘ื“ื•ืื•ืœื™ื ื’ื•
08:25
we actually stop sending notifications after seven days of inactivity.
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ืื ื—ื ื• ืžืคืกื™ืงื™ื ืœืฉืœื•ื— ื”ืชืจืื•ืช ืœืื—ืจ ืฉื‘ืขื” ื™ืžื™ ื—ื•ืกืจ ืคืขื™ืœื•ืช.
ืื– ืื ืœื ืชืฉืชืžืฉื• ื‘ื“ื•ืื•ืœื™ื ื’ื• ื‘ืžืฉืš ืฉื‘ืขื” ื™ืžื™ื,
08:28
So if you don't use Duolingo for seven days,
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ืื ื—ื ื• ื ืคืกื™ืง ืœืฉืœื•ื— ืœื›ื ื”ืชืจืื•ืช.
08:30
we stop sending you notifications.
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ื‘ืฉืœื‘ ืžืกื•ื™ื ืขืœื” ื‘ื“ืขืชื ื•,
08:32
Now, at some point it occurred to us,
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ืื ืื ื—ื ื• ืžืคืกื™ืงื™ื ืœืฉืœื•ื— ื”ื•ื“ืขื•ืช ืœืื ืฉื™ื, ืื ื—ื ื• ืฆืจื™ื›ื™ื ืœื™ื™ื“ืข ืื•ืชื ืขืœ ื›ืš.
08:34
if we're stopping to send people notifications,
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08:36
we should let them know.
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ืื– ื”ืชื—ืœื ื• ืœืฉืœื•ื— ืœืื ืฉื™ื ืืช ื”ื”ื•ื“ืขื” ื”ื–ื• ืฉืื•ืžืจืช,
08:37
So we started sending this notification to people saying,
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08:40
"Hey, these reminders don't seem to be working.
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โ€œื”ื™ื™, ื ืจืื” ืฉื”ืชื–ื›ื•ืจื•ืช ื”ืืœื” ืœื ืขื•ื‘ื“ื•ืช. ืื ื—ื ื• ื ืคืกื™ืง ืœืฉืœื•ื— ืื•ืชืŸ ืœืขืช ืขืชื”โ€œ.
08:42
We'll stop sending them for now."
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ืืชื ื™ื•ื“ืขื™ื ืžื” ืื ืฉื™ื ืขื•ืฉื™ื ื›ืฉื”ื ืžืงื‘ืœื™ื ืืช ื”ื”ื•ื“ืขื” ื”ื–ื•?
08:44
You know what people do when they get this notification?
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ื”ื ื—ื•ื–ืจื™ื.
08:47
They come back.
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(ืฆื—ื•ืง)
08:48
(Laughter)
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08:50
Passive aggressive.
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ืคืืกื™ื‘-ืื’ืจืกื™ื‘.
08:51
(Laughter)
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(ืฆื—ื•ืง)
08:54
Works for my mother, works for Duolingo.
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ืขื•ื‘ื“ ืœืืžื ืฉืœื™, ืขื•ื‘ื“ ืขื‘ื•ืจ ื“ื•ืื•ืœื™ื ื’ื•.
08:56
(Laughter and applause)
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(ืฆื—ื•ืง ื•ืžื—ื™ืื•ืช ื›ืคื™ื™ื)
09:02
These passive aggressive notifications
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ื”ื”ื•ื“ืขื•ืช ื”ืคืกื™ื‘ื™ื•ืช-ืื’ืจืกื™ื‘ื™ื•ืช ื”ืืœื” ืžืžืฉ ื˜ื•ื‘ื•ืช ื‘ืœื’ืจื•ื ืœืื ืฉื™ื ืœื—ื–ื•ืจ
09:04
are really good at getting people to come back
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ื›ื™ ื”ื ืžืจื’ื™ืฉื™ื ืฉืงืžื™ืข ื”ื™ื ืฉื•ืฃ ื”ื™ืจื•ืง ืฉืœื ื• ื•ื™ืชืจ ืขืœื™ื”ื.
09:07
back because they feel like our green owl mascot has given up on them,
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ืื– ื”ื ื—ื•ื–ืจื™ื. ื•ืื ืžื“ื‘ืจื™ื ืขืœ ืงืžืข ื”ื™ื ืฉื•ืฃ ื”ื™ืจื•ืง ืฉืœื ื•, ื“ืจืš ืื’ื‘,
09:10
so they come back.
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09:11
And speaking of our green owl mascot, by the way,
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ื›ืœ ื”ื”ื•ื“ืขื•ืช ืฉืœื ื• ื”ืŸ ืžืงืžืข ื”ื™ื ืฉื•ืฃ ื”ื™ืจื•ืง ืฉืœื ื•
09:13
because all our notifications come from our green owl mascot
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ื•ื”ื•ื, ื•ื‘ื›ืŸ, ืคืกื™ื‘ื™-ืื’ืจืกื™ื‘ื™ ื•ื’ื ื“ื™ ื“ื•ื—ืฃ,
09:16
and well, he's passive aggressive and also pretty pushy,
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ื–ื” ื”ื•ืœื™ื“ ื”ืจื‘ื” ืžืžื™ื ื‘ืื™ื ื˜ืจื ื˜
09:19
this has given rise to a lot of memes on the internet
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ืฉืœื•ืขื’ื™ื ืœืžืืžืฅ ื”ื’ื“ื•ืœ ืฉื”ื•ื ื™ืขืฉื” ื›ื“ื™ ืœื”ื—ื–ื™ืจ ืืชื›ื ืœืœืžื•ื“ ืฉืคื”.
09:21
that make fun of the great lengths that he will go through
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09:24
to get you back to learn a language.
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09:26
Here's one of my favorite ones.
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ื”ื ื” ืื—ื“ ื”ืื”ื•ื‘ื™ื ืขืœื™. ื–ื”ื• ืžื, ื–ื” ืื—ื“ ื”ืื”ื•ื‘ื™ื ืขืœื™.
09:28
This is it's a meme, itโ€™s one of my favorite ones.
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(ืฆื—ื•ืง)
09:30
(Laughter)
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09:32
Basically looks like you forgot your Spanish lessons.
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ื‘ื’ื“ื•ืœ, ื–ื” โ€œื ืจืื” ืฉืฉื›ื—ืช ืืช ืฉื™ืขื•ืจื™ ื”ืกืคืจื“ื™ืช ืฉืœืš.โ€
09:35
And then there's an intruder alert,
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ื•ืื– ื™ืฉื ื” ื”ืชืจืืช ืคื•ืœืฉ, ืœื›ืื•ืจื” ื”ื™ื ืฉื•ืฃ ืคืจืฅ ืœื‘ื™ืช ืฉืœืš ื›ื“ื™ ืœื’ืจื•ื ืœืš ืœืœืžื•ื“ ืฉืคื”.
09:36
presumably the owl broke into your house to get you to learn language.
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09:40
Now, Duolingo has entered the zeitgeist.
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ืขื›ืฉื™ื•, ื“ื•ืื•ืœื™ื ื’ื• ื ื›ื ืก ืœืจื•ื— ื”ื–ืžืŸ.
09:43
And there's thousands of memes, there's SNL skits about it.
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ื•ื™ืฉ ืืœืคื™ ืžืžื™ื, ื™ืฉ ืžืขืจื›ื•ื ื™ื ืฉืœ SNL ืขืœ ื–ื”.
09:46
And it's because we've managed to get people to want to learn a language
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ื•ื–ื” ื‘ื’ืœืœ ืฉื”ืฆืœื—ื ื• ืœื’ืจื•ื ืœืื ืฉื™ื ืœืจืฆื•ืช ืœืœืžื•ื“ ืฉืคื”
09:50
by using the same techniques
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ื‘ืืžืฆืขื•ืช ืื•ืชืŸ ื˜ื›ื ื™ืงื•ืช ื‘ื”ืŸ ืžืฉืชืžืฉื™ื ืžืฉื—ืงื™ื ื ื™ื™ื“ื™ื ื•ืžื“ื™ื” ื—ื‘ืจืชื™ืช
09:52
that mobile games and social media use to get people engaged.
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ื›ื“ื™ ืœื’ืจื•ื ืœืื ืฉื™ื ืœื”ื™ื•ืช ืžืขื•ืจื‘ื™ื.
09:57
And this is a really important point,
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ื•ื–ื• ื ืงื•ื“ื” ื—ืฉื•ื‘ื” ืžืื“, ื”ืจืฉื• ืœื™ ืœื•ืžืจ ื–ืืช.
10:00
let me say this.
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10:02
I don't actually believe that there's a way to make an educational app
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ืื ื™ ืœื ื‘ืืžืช ืžืืžื™ืŸ ืฉื™ืฉ ื“ืจืš ืœื’ืจื•ื ืœืืคืœื™ืงืฆื™ื” ื—ื™ื ื•ื›ื™ืช
10:05
be as engaging as something like TikTok or Instagram or mobile games.
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ืœื”ื™ื•ืช ืžืจืชืงืช ื›ืžื• ืžืฉื”ื• ื›ืžื• TikTok ืื• ืื™ื ืกื˜ื’ืจื ืื• ืžืฉื—ืงื™ื ื ื™ื™ื“ื™ื.
10:11
But the good news is that --
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ืื‘ืœ ื”ื—ื“ืฉื•ืช ื”ื˜ื•ื‘ื•ืช ื”ืŸ --
10:12
And by the way, the reason I don't believe that
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ื•ื“ืจืš ืื’ื‘, ื”ืกื™ื‘ื” ืฉืื ื™ ืœื ืžืืžื™ืŸ ื‘ื–ื”
10:14
is because ultimately you have to teach people something.
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ื”ื™ื ื›ื™ ื‘ืกื•ืคื• ืฉืœ ื“ื‘ืจ ืืชื” ืฆืจื™ืš ืœืœืžื“ ืื ืฉื™ื ืžืฉื”ื•.
ื•ืงืฉื” ืœื”ืชื—ืจื•ืช ืขื, ื›ื–ื”, ื—ืชื•ืœื™ื ื•ืกืœื‘ืจื™ื˜ืื™ื.
10:17
And it's hard to compete with, like, cats and celebrities.
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ืื‘ืœ ื”ื—ื“ืฉื•ืช ื”ื˜ื•ื‘ื•ืช ื”ืŸ ืฉืื ื™ ืœื ื—ื•ืฉื‘ ืฉื—ื™ื™ื‘ื™ื.
10:20
But the good news is that I don't think you have to.
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10:22
See, here's the thing.
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ืืชื ืžื‘ื™ื ื™ื, ื”ื ื” ื”ืขื ื™ื™ืŸ. ื›ืฉืืชื ืœื•ืžื“ื™ื ืžืฉื”ื•, ืืชื ืžืงื‘ืœื™ื ืžื–ื” ืžืฉืžืขื•ืช.
10:23
When you're learning something, you get meaning out of it.
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10:26
Whereas when you're scrolling for two hours on Instagram,
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ื•ืื™ืœื• ื›ืฉืืชื ื’ื•ืœืœื™ื ื‘ืžืฉืš ืฉืขืชื™ื™ื ื‘ืื™ื ืกื˜ื’ืจื, ื”ืจื‘ื” ืคืขืžื™ื, ืื—ืจ ื›ืš,
10:29
a lot of times afterwards, you feel like you just wasted your time.
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ืืชื ืžืจื’ื™ืฉื™ื ื›ืื™ืœื• ื‘ื–ื‘ื–ืชื ืืช ื–ืžื ื›ื.
10:32
So I think it's actually OK if your educational product
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ืื– ืื ื™ ื—ื•ืฉื‘ ืฉื–ื” ื‘ืกื“ืจ ืื ื”ืžื•ืฆืจ ื”ื—ื™ื ื•ื›ื™ ืฉืœื›ื
10:36
is only 80 or 90 percent as engaging as something like TikTok,
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ื”ื•ื ืจืง 80 ืื• 90 ืื—ื•ื– ืžืจืชืง ื›ืžื• ืžืฉื”ื• ื›ืžื• TikTok,
10:39
because the other 10 or 20 percent
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ื›ื™ 10 ืื• 20 ื”ืื—ื•ื–ื™ื ื”ืื—ืจื™ื
10:41
will be provided by people's internal motivation,
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ื™ืกื•ืคืงื• ืขืœ ื™ื“ื™ ื”ืžื•ื˜ื™ื‘ืฆื™ื” ื”ืคื ื™ืžื™ืช ืฉืœ ืื ืฉื™ื,
10:44
though of course, not much more than that.
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ืื ื›ื™ ื›ืžื•ื‘ืŸ, ืœื ื”ืจื‘ื” ื™ื•ืชืจ ืžื–ื”.
10:46
This is really a key point.
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ื–ื• ื‘ืืžืช ื ืงื•ื“ืช ืžืคืชื—.
10:47
If we want to get people to do something meaningful,
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ืื ืื ื—ื ื• ืจื•ืฆื™ื ืœื’ืจื•ื ืœืื ืฉื™ื ืœืขืฉื•ืช ืžืฉื”ื• ืžืฉืžืขื•ืชื™,
10:51
you can use the same techniques that apps like social media use
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ืืคืฉืจ ืœื”ืฉืชืžืฉ ื‘ืื•ืชืŸ ื˜ื›ื ื™ืงื•ืช ื‘ื”ืŸ ืžืฉืชืžืฉื•ืช ืืคืœื™ืงืฆื™ื•ืช ื›ืžื• ืžื“ื™ื” ื—ื‘ืจืชื™ืช
10:54
to get people to do it.
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ื›ื“ื™ ืœื’ืจื•ื ืœืื ืฉื™ื ืœืขืฉื•ืช ืืช ื–ื”. ื•ื’ื ืื ืืชื ืœื ืžืจืชืงื™ื ื›ืžื• ื”ืืคืœื™ืงืฆื™ื•ืช ื”ืืœื”,
10:56
And even if you're not as engaging as those apps are,
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10:59
you can still get hundreds of millions of people to use your product.
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ืืชื ืขื“ื™ื™ืŸ ื™ื›ื•ืœื™ื ืœื’ืจื•ื ืœืžืื•ืช ืžื™ืœื™ื•ื ื™ ืื ืฉื™ื ืœื”ืฉืชืžืฉ ื‘ืžื•ืฆืจ ืฉืœื›ื.
11:02
In the case of Duolingo, for example,
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ื‘ืžืงืจื” ืฉืœ ื“ื•ืื•ืœื™ื ื’ื•, ืœืžืฉืœ,
11:04
there are more people learning languages on Duolingo in the United States
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ื™ืฉ ื™ื•ืชืจ ืื ืฉื™ื ื”ืœื•ืžื“ื™ื ืฉืคื•ืช ื‘ื“ื•ืื•ืœื™ื ื’ื• ื‘ืืจืฆื•ืช ื”ื‘ืจื™ืช
11:08
than there are people learning languages across all US high schools combined.
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ืžืืฉืจ ืื ืฉื™ื ื”ืœื•ืžื“ื™ื ืฉืคื•ืช ื‘ื›ืœ ื‘ืชื™ ื”ืกืคืจ ื”ืชื™ื›ื•ื ื™ื™ื ื‘ืืจื”โ€œื‘ ื’ื ื™ื—ื“.
(ืžื—ื™ืื•ืช ื›ืคื™ื™ื)
11:12
(Applause)
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11:13
And this is true in most countries in the world.
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ื•ื–ื” ื ื›ื•ืŸ ื‘ืจื•ื‘ ื”ืžื“ื™ื ื•ืช ื‘ืขื•ืœื.
11:16
My hope is that -- I know we can do this, but, you know,
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ื”ืชืงื•ื•ื” ืฉืœื™ ื”ื™ื ืฉ -- ืื ื™ ื™ื•ื“ืข ืฉืื ื—ื ื• ื™ื›ื•ืœื™ื ืœืขืฉื•ืช ืืช ื–ื”, ืื‘ืœ, ืืชื ื™ื•ื“ืขื™ื,
11:20
my hope is that as humanity,
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ื”ืชืงื•ื•ื” ืฉืœื™ ื”ื™ื ืฉื›ืื ื•ืฉื•ืช, ื ื•ื›ืœ ืœืขืฉื•ืช ืžื” ืฉื“ื•ืื•ืœื™ื ื’ื• ืขืฉื” ืœืœื™ืžื•ื“ ืฉืคื•ืช
11:21
we can do what Duolingo has done for learning languages
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11:24
but for all other subjects.
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ืื‘ืœ ืœื›ืœ ืฉืืจ ื”ื ื•ืฉืื™ื.
11:26
Where we can get people to learn math with mobile phones,
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ืฉื ื•ื›ืœ ืœื’ืจื•ื ืœืื ืฉื™ื ืœืœืžื•ื“ ืžืชืžื˜ื™ืงื” ืขื ื˜ืœืคื•ื ื™ื ื ื™ื™ื“ื™ื,
11:29
like millions of people to learn math with mobile phones
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ืฉืžื™ืœื™ื•ื ื™ ืื ืฉื™ื ื™ืœืžื“ื• ืžืชืžื˜ื™ืงื” ื‘ื˜ืœืคื•ืŸ ื”ื ื™ื™ื“
11:32
or physics or whatever.
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ืื• ืคื™ื–ื™ืงื” ืื• ื›ืœ ื“ื‘ืจ ืื—ืจ.
11:34
I hope for a future in which screen time is not a bad thing,
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ืื ื™ ืžืงื•ื•ื” ืœืขืชื™ื“ ื‘ื• ื–ืžืŸ ื”ืžืกืš ืื™ื ื• ื“ื‘ืจ ืจืข,
11:38
in which we can deliver high-quality education to everyone, rich or poor,
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ื‘ื• ื ื•ื›ืœ ืœืกืคืง ื—ื™ื ื•ืš ืื™ื›ื•ืชื™ ืœื›ื•ืœื, ืขืฉื™ืจื™ื ืื• ืขื ื™ื™ื,
ื‘ืืžืฆืขื•ืช ื˜ืœืคื•ืŸ ื ื™ื™ื“.
11:42
using a mobile phone.
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11:43
But the single most important thing that I can end this talk with,
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ืื‘ืœ ื”ื“ื‘ืจ ื”ื—ืฉื•ื‘ ื‘ื™ื•ืชืจ ืฉืื ื™ ื™ื›ื•ืœ ืœืกื™ื™ื ืื™ืชื• ืืช ื”ืฉื™ื—ื” ื”ื–ื•,
11:47
is a reminder to please, pretty please, I beg you,
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ื”ื•ื ืชื–ื›ื•ืจืช ืœืจืฆื•ืช, ื‘ื‘ืงืฉื”, ืื ื™ ืžืชื—ื ืŸ ื‘ืคื ื™ื›ื,
11:52
do your language lessons today.
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ืชืขืฉื• ืืช ืฉื™ืขื•ืจื™ ื”ืฉืคื” ืฉืœื›ื ื”ื™ื•ื.
11:53
Thank you very much.
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ืชื•ื“ื” ืจื‘ื” ืœื›ื.
11:55
(Laughter)
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(ืฆื—ื•ืง)
11:56
Thank you.
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ืชื•ื“ื”.
11:57
(Applause)
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(ืžื—ื™ืื•ืช ื›ืคื™ื™ื)
12:05
Helen Walters: Luis, thank you so much.
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ื”ืœืŸ ื•ื•ืœื˜ืจืก: ืœื•ืื™ืก, ืชื•ื“ื” ืจื‘ื” ืœืš, ืชื•ื“ื”.
12:07
I wonder if you can just say a little bit more about that last point,
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ืื ื™ ืชื•ื”ื” ืื ืืชื” ื™ื›ื•ืœ ืคืฉื•ื˜ ืœื•ืžืจ ืงืฆืช ื™ื•ืชืจ ืขืœ ื”ื ืงื•ื“ื” ื”ืื—ืจื•ื ื” ื”ื–ื•,
12:10
how do you think you can apply this type of thinking
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ืื™ืš ืืชื” ื—ื•ืฉื‘ ืฉืืชื” ื™ื›ื•ืœ ืœื™ื™ืฉื ืกื•ื’ ื–ื” ืฉืœ ื—ืฉื™ื‘ื”
12:14
to other subjects?
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ืขืœ ื ื•ืฉืื™ื ืื—ืจื™ื?
12:16
So you mentioned math, and things like that.
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ืื– ื”ื–ื›ืจืช ืžืชืžื˜ื™ืงื” ื•ื“ื‘ืจื™ื ื›ืืœื”. ืื™ืš ืืชื” ืขื•ืฉื” ืืช ื–ื”?
12:18
How do you do that?
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12:20
Luis von Ahn: I think in particular,
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ืœื•ืื™ืก ืคื•ืŸ ืื”ืŸ: ื›ืŸ, ืื ื™ ื—ื•ืฉื‘ ืฉื‘ืžืงืฆื•ืขื•ืช ืžืกื•ื™ืžื™ื
12:22
subjects that are learned through repetition
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ืฉื ืœืžื“ื™ื ื‘ืืžืฆืขื•ืช ื—ื–ืจื”, ื•ืžืชื‘ืจืจ ืฉืจื•ื‘ ื”ื“ื‘ืจื™ื ืฉื”ื ื“ื™ ืžืฉืžืขื•ืชื™ื™ื
12:24
and it turns out most things that are kind of really meaningful
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ื‘ืืžืช ื ืœืžื“ื™ื ื‘ืืžืฆืขื•ืช ืืœืคื™ ื—ื–ืจื•ืช.
12:27
are learned through thousands of repetitions.
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ืœื•ืžื“ื™ื ืœืงืจื•ื ื“ืจืš ื—ื–ืจื”,
12:29
You learn to read through repetition,
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ืœื•ืžื“ื™ื ืžืชืžื˜ื™ืงื” ื‘ื‘ื™ืช ื”ืกืคืจ ื”ื™ืกื•ื“ื™ ื“ืจืš ื—ื–ืจื”.
12:31
you learn elementary school math through repetition.
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ืืช ืจื•ื‘ ื”ื“ื‘ืจื™ื ืฉืืคืฉืจ ืœืœืžื•ื“ ื“ืจืš ื—ื–ืจื”,
12:33
Most things that you can learn through repetition,
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ืืคืฉืจ ืœืžืขืฉื” ืœืžืฉื—ืง ื•ืœื”ืคื•ืš ืœืžืฉื”ื• ื›ืžื• ื“ื•ืื•ืœื™ื ื’ื•,
12:35
you can actually gamify and turn into something like Duolingo,
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ืฉื‘ื• ืื ืฉื™ื ืคืฉื•ื˜ ืขื•ืฉื™ื ืืช ื–ื” ื”ืจื‘ื” ื•ืขื•ืฉื™ื ืืช ื–ื” ื›ื™ืฃ.
12:38
where people just do it a lot and do it fun.
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ื–ื” ืงืฆืช ื™ื•ืชืจ ืงืฉื” ืขื ื“ื‘ืจื™ื ื›ืžื• ื”ืกื‘ืจื™ื.
12:40
It's a little harder for things like explanations.
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ื–ื” ื›ื ืจืื” ื”ื•ืœืš ืœื“ืจื•ืฉ ื›ืžื” ืกืจื˜ื•ื ื™ื ืžืžืฉ ื˜ื•ื‘ื™ื. ืกืืœ ื—ืืŸ ืขื•ืฉื” ืขื‘ื•ื“ื” ืžืžืฉ ื˜ื•ื‘ื” ืขื ื–ื”.
12:43
That probably is going to require some really good videos.
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12:46
Sal Khan is doing a really good job with that.
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ืื‘ืœ ืœื“ื‘ืจื™ื ืฉื“ื•ืจืฉื™ื ื”ืจื‘ื” ื—ื–ืจื•ืช, ืื ื™ ื—ื•ืฉื‘ ืฉืืคืฉืจ ืœื”ืฉืชืžืฉ ื‘ืื•ืชืŸ ืฉื™ื˜ื•ืช.
12:48
But for things that require a lot of repetition,
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ื”ืœืŸ ื•ื•ืœื˜ืจืก: ืžื“ื”ื™ื, ืชื•ื“ื” ืฉืฉื™ืชืคืช ืื•ืชื ื•. ืœื•ืื™ืก ืคื•ืŸ ืื”ืŸ: ืชื•ื“ื”.
12:50
I think we can use the same methods.
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12:52
(Applause)
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(ืžื—ื™ืื•ืช ื›ืคื™ื™ื)
ืขืœ ืืชืจ ื–ื”

ืืชืจ ื–ื” ื™ืฆื™ื’ ื‘ืคื ื™ื›ื ืกืจื˜ื•ื ื™ YouTube ื”ืžื•ืขื™ืœื™ื ืœืœื™ืžื•ื“ ืื ื’ืœื™ืช. ืชื•ื›ืœื• ืœืจืื•ืช ืฉื™ืขื•ืจื™ ืื ื’ืœื™ืช ื”ืžื•ืขื‘ืจื™ื ืขืœ ื™ื“ื™ ืžื•ืจื™ื ืžื”ืฉื•ืจื” ื”ืจืืฉื•ื ื” ืžืจื—ื‘ื™ ื”ืขื•ืœื. ืœื—ืฅ ืคืขืžื™ื™ื ืขืœ ื”ื›ืชื•ื‘ื™ื•ืช ื‘ืื ื’ืœื™ืช ื”ืžื•ืฆื’ื•ืช ื‘ื›ืœ ื“ืฃ ื•ื™ื“ืื• ื›ื“ื™ ืœื”ืคืขื™ืœ ืืช ื”ืกืจื˜ื•ืŸ ืžืฉื. ื”ื›ืชื•ื‘ื™ื•ืช ื’ื•ืœืœื•ืช ื‘ืกื ื›ืจื•ืŸ ืขื ื”ืคืขืœืช ื”ื•ื•ื™ื“ืื•. ืื ื™ืฉ ืœืš ื”ืขืจื•ืช ืื• ื‘ืงืฉื•ืช, ืื ื ืฆื•ืจ ืื™ืชื ื• ืงืฉืจ ื‘ืืžืฆืขื•ืช ื˜ื•ืคืก ื™ืฆื™ืจืช ืงืฉืจ ื–ื”.

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