Richard Baraniuk on open-source learning

103,017 views ・ 2007-01-12

TED


Please double-click on the English subtitles below to play the video.

00:25
I'm Rich Baraniuk and what I'd like to talk a little bit about today
0
25000
3191
00:28
are some ideas that I think have just tremendous resonance
1
28215
3721
00:31
with all the things that have been talked about the last two days.
2
31960
3496
00:35
So many different points of resonance
3
35480
1776
00:37
that it's going to be difficult to bring them all up,
4
37280
2477
00:39
but I'll try to do my best.
5
39781
1315
00:41
Does anybody remember these?
6
41120
1376
00:42
(Laughter)
7
42520
1776
00:44
OK, so these are LP records and they've been replaced, right?
8
44320
5976
00:50
They've been swept away over the last two decades
9
50320
2696
00:53
by these types of world-flattening digitization technologies, right?
10
53040
4856
00:57
And I think it was best witnessed
11
57920
2616
01:00
when Thomas was playing the music as we came in the room today.
12
60560
3816
01:04
What's happened in the music world is there's a culture,
13
64400
2656
01:07
or an ecosystem that's been created
14
67080
1776
01:08
that, if you take some words from Apple,
15
68880
2576
01:11
the catchphrase -- that we create, rip, mix and burn.
16
71480
3976
01:15
What I mean by that is that anyone in the world is free and allowed
17
75480
3176
01:18
to create new music and musical ideas.
18
78680
2336
01:21
Anyone in the world is allowed to rip or copy musical ideas,
19
81040
3696
01:24
use them in innovative ways.
20
84760
1736
01:26
Anyone is allowed to mix them in different types of ways,
21
86520
2975
01:29
draw connections between musical ideas,
22
89519
2177
01:31
and people can burn them or create final products and continue the circle.
23
91720
3976
01:35
And what that's done is it's created, like I said,
24
95720
2336
01:38
a vibrant community that's very inclusive,
25
98080
2000
01:40
with people continually working to connect musical ideas,
26
100104
3712
01:43
innovate them and keep things constantly up to date.
27
103840
3416
01:47
Today's hit single is not last year's hit single.
28
107280
3776
01:51
But I'm not here to talk about music today.
29
111080
2176
01:53
I'm here to talk about books.
30
113280
1456
01:54
In particular, textbooks and the kind of educational materials
31
114760
3416
01:58
that we use every day in school.
32
118200
2416
02:00
Has anyone here ever been to school?
33
120640
1715
02:02
(Laughter)
34
122379
1397
02:03
OK, does anybody realize there's a crisis in our schools,
35
123800
3976
02:07
around the world?
36
127800
1776
02:09
I'm not going to spend too much time on that,
37
129600
2536
02:12
but what I want to talk about is some of the disconnects
38
132160
3336
02:15
that appear when an author publishes a book.
39
135520
2496
02:18
That in fact, the publishing process --
40
138040
1858
02:19
just because of the fact that it's complicated,
41
139922
2191
02:22
it's heavy, books are expensive --
42
142137
1679
02:23
creates a sort of a wall between authors of books
43
143840
3296
02:27
and the ultimate users of books,
44
147160
1536
02:28
be they teachers, students or just general readers.
45
148720
4096
02:32
And this is even more true if you happen to speak a language
46
152840
3136
02:36
other than one of the world's major languages, and especially English.
47
156000
3936
02:39
I'm going to call these people below the barrier "shutouts"
48
159960
2816
02:42
because they're really shut out of the process
49
162800
2143
02:44
of being able to share their knowledge with the world.
50
164967
2528
02:47
And so what I want to talk about today is trying to take these ideas
51
167519
3192
02:50
that we've seen in the musical culture
52
170735
1823
02:52
and try to bring these towards reinventing the way
53
172582
2341
02:54
we think about writing books, using them and teaching from them.
54
174947
3829
02:58
So, that's what I'd like to talk about
55
178800
1816
03:00
and, really, how we get from where we are now
56
180640
2239
03:02
to where we need to go.
57
182903
1273
03:04
The first thing I'd like you to do is a little thought experiment.
58
184200
3096
03:07
Imagine taking all the world's books.
59
187320
1762
03:09
OK, everybody imagine books and imagine just tearing out the pages.
60
189106
3510
03:12
So, liberating these pages
61
192640
2096
03:14
and imagine digitizing them and then storing them
62
194760
3256
03:18
in a vast, interconnected, global repository.
63
198040
2896
03:20
Think of it as a massive iTunes for book-type content.
64
200960
5616
03:26
And then take that material and imagine making it all open,
65
206600
3256
03:29
so that people can modify it, play with it, improve it.
66
209880
3056
03:32
Imagine making it free,
67
212960
1256
03:34
so that anyone in the world can have access to all of this knowledge,
68
214240
3239
03:37
and imagine using information technology
69
217503
2353
03:39
so that you can update this content, improve it, play with it,
70
219880
3336
03:43
on a timescale that's more on the order of seconds instead of years.
71
223240
4656
03:47
Instead of editions of a book coming out every two years,
72
227920
2856
03:50
imagine them coming out every 25 seconds.
73
230800
2936
03:53
So, imagine we could do that and imagine we could put people into this.
74
233760
4256
03:58
So that we could truly build an ecosystem with not just authors,
75
238040
3376
04:01
but all the people who could be or want to be authors
76
241440
3576
04:05
in all the different languages of the world,
77
245040
2056
04:07
and I think if you could do this, it would be called --
78
247120
2576
04:09
I'm just going to refer to it as a knowledge ecosystem.
79
249720
2576
04:12
So, really, this is the dream,
80
252320
2096
04:14
and in a sense what you can think of it
81
254440
1858
04:16
is we're trying to enable anyone in the world,
82
256322
2143
04:18
I mean anyone in the world --
83
258489
1527
04:20
(Laughter)
84
260040
1216
04:21
to be their own educational DJ,
85
261280
2096
04:23
creating educational materials, sharing them with the world,
86
263400
2816
04:26
constantly innovating on them.
87
266240
1736
04:28
So, this is the dream.
88
268000
1216
04:29
In fact, this dream is actually being realized.
89
269240
2816
04:32
Over the last six-and-a-half years,
90
272080
1816
04:33
we've been working really hard at Rice University
91
273920
2656
04:36
on a project called Connexions,
92
276600
1576
04:38
and so what I'd like to do for the rest of the talk
93
278200
2416
04:40
is just tell you a little bit
94
280640
1381
04:42
about what people are doing with Connexions,
95
282045
2051
04:44
which you can kind of think of as the counterpoint
96
284120
2336
04:46
to Nicholas Negroponte's talk yesterday,
97
286480
1905
04:48
where they're working on the hardware of bringing education to the world.
98
288409
3429
04:51
We're working on the open-source tools
99
291862
2474
04:54
and the content.
100
294360
1536
04:55
So, that's sort of to put it in perspective here.
101
295920
2816
04:58
So, create.
102
298760
1576
05:00
What are some of the people that are using these kind of tools?
103
300360
2976
05:03
Well, the first thing is,
104
303360
1216
05:04
there's a community of engineering professors,
105
304600
2856
05:07
from Cambridge to Kyoto,
106
307480
2096
05:09
who are developing engineering content in electrical engineering
107
309600
3936
05:13
to develop what you can think of as a massive, super textbook
108
313560
3976
05:17
that covers the entire area of electrical engineering.
109
317560
2936
05:20
And not only that --
110
320520
1216
05:21
it can be customized for use in each of their own individual institutions.
111
321760
4280
05:27
If people like Kitty Jones, a shut-out --
112
327120
3456
05:30
a private music teacher and mom from Champagne, Illinois,
113
330600
4376
05:35
who wanted to share her fantastic music content with the world,
114
335000
3376
05:38
on how to teach kids how to play music --
115
338400
2256
05:40
Her material is now used over 600,000 times per month.
116
340680
5456
05:46
Tremendous use.
117
346160
1496
05:47
In fact, a lot of this use coming from United States K-12 schools,
118
347680
4256
05:51
because anyone who's involved in a school scale back,
119
351960
4416
05:56
the first thing that's cut is the music curriculum.
120
356400
2656
05:59
And so this is just indicating the tremendous thirst
121
359080
2496
06:01
for this kind of open, free content.
122
361600
2136
06:03
A lot of teachers are using this stuff.
123
363760
2376
06:06
What about ripping? What about copying, reusing?
124
366160
3056
06:09
A team of volunteers at the University of Texas at El Paso --
125
369240
3416
06:12
graduate students translating this engineering super textbook ideas.
126
372680
4856
06:17
And within about a week,
127
377560
1616
06:19
having this be some of our most popular material
128
379200
2336
06:21
in widespread use all over Latin America, and in particular in Mexico,
129
381560
4376
06:25
because of the open, extensible nature of this.
130
385960
2816
06:28
People, volunteers and even companies
131
388800
2816
06:31
that are translating materials into Asian languages
132
391640
2616
06:34
like Chinese, Japanese and Thai,
133
394280
2176
06:36
to spread the knowledge even further.
134
396480
3400
06:40
OK, what about people who are mixing?
135
400760
1776
06:42
What does "mixing" mean?
136
402560
1176
06:43
"Mixing" means building customized courses,
137
403760
2016
06:45
means building customized books.
138
405800
3496
06:49
Companies like National Instruments,
139
409320
1736
06:51
who are embedding very powerful, interactive simulations
140
411080
5096
06:56
into the materials,
141
416200
1176
06:57
so that we can go way beyond our regular kind of textbook
142
417400
2936
07:00
to an experience
143
420360
1216
07:01
that all the teaching materials are things you can actually interact with
144
421600
3936
07:05
and play around with and actually learn as you do.
145
425560
3936
07:09
We've been working with Teachers Without Borders,
146
429520
2336
07:11
who are very interested in mixing our materials.
147
431880
2239
07:14
They're going to be using Connexions as their platform
148
434143
2673
07:16
to develop and deliver teaching materials for teaching teachers how to teach
149
436840
5216
07:22
in 84 countries around the world.
150
442080
2576
07:24
TWB is currently in Iraq,
151
444680
3216
07:27
training 20,000 teachers supported by USAID.
152
447920
4536
07:32
And to them, this idea of being able to remix
153
452480
2816
07:35
and customize to the local context is extraordinarily important,
154
455320
4656
07:40
because just providing free content to people
155
460000
2736
07:42
has actually been likened by people in the developing world
156
462760
3016
07:45
to a kind of cultural imperialism --
157
465800
2336
07:48
that if you don't empower people
158
468160
1536
07:49
with the ability to re-contextualize the material,
159
469720
2376
07:52
translate it into their own language and take ownership of it,
160
472120
3176
07:55
it's not good.
161
475320
1736
07:57
OK, other organizations we've been working with, UC Merced --
162
477080
4376
08:01
people know about UC Merced.
163
481480
1776
08:03
It's a new university in California, in the Central Valley,
164
483280
3896
08:07
working very closely with community colleges.
165
487200
2736
08:09
They're actually developing
166
489960
1336
08:11
a lot of their science and engineering curriculum
167
491320
2296
08:13
to spread widely around the world in our system.
168
493640
4496
08:18
And they're also trying to develop all of their software tools
169
498160
2905
08:21
completely open-source.
170
501089
1407
08:22
We've been working with AMD, which has a project called 50x15,
171
502520
4736
08:27
which is trying to bring Internet connectivity
172
507280
2736
08:30
to 50 percent of the world's population by 2015.
173
510040
3616
08:33
We're going to be providing content to them
174
513680
2016
08:35
in a whole range of different languages.
175
515720
2136
08:37
And we've also been working with a number of other organizations.
176
517880
3096
08:41
In particular, a bunch of the projects that are funded by Hewlett Foundation,
177
521000
4016
08:45
who have taken a real leadership role in this area of open content.
178
525040
4456
08:49
OK, burn -- I think this is, sort of, quite interesting.
179
529520
3576
08:53
"Burn" is the idea of trying to create the physical instantiation
180
533120
4256
08:57
of one of these courses.
181
537400
1216
08:58
And I think a lot of you received --
182
538640
2056
09:00
I think all of you received one of these music books in your gift pack.
183
540720
5856
09:06
A little present for you.
184
546600
1456
09:08
Just to tell you quickly about it: this is an engineering textbook.
185
548080
3496
09:11
It's about 300 pages long, hardbound.
186
551600
3640
09:16
This costs -- anybody guess?
187
556200
2320
09:20
How much would it cost in a bookstore?
188
560320
2056
09:22
(Audience) 65 dollars.
189
562400
1216
09:23
Richard Baraniuk: OK. This costs 22 dollars to the student.
190
563640
4736
09:28
Why does it cost 22 dollars?
191
568400
1336
09:29
Because it's published on demand
192
569760
1976
09:31
and it's developed from this repository of open materials.
193
571760
3536
09:35
If this book were to be published by a regular publisher,
194
575320
2696
09:38
it would cost at least 122 dollars.
195
578040
3176
09:41
So what we're seeing
196
581240
1216
09:42
is moving this burning or publication process
197
582480
2896
09:45
from the regular, sort of single-authored book
198
585400
3496
09:48
towards community-authored materials
199
588920
2376
09:51
that are modular, that are customized to each individual class
200
591320
3736
09:55
and published on demand very inexpensively,
201
595080
2656
09:57
either pushed out through Amazon
202
597760
2496
10:00
or published directly through an on-demand press, like QOOP.
203
600280
4176
10:04
And I think that this is an extraordinarily interesting area
204
604480
3416
10:07
because there is tremendous area under this long tail in publishing.
205
607920
5816
10:13
We're not talking about the Harry Potter end,
206
613760
2136
10:15
right at the left side.
207
615920
1216
10:17
We're talking about books
208
617160
1216
10:18
on hypergeometric partial differential equations.
209
618400
2616
10:21
Books that might sell 100 copies a year, 1,000 copies a year.
210
621040
4296
10:25
There is tremendous sustaining revenue under this long tail
211
625360
4856
10:30
to sustain open projects like ours,
212
630240
2416
10:32
but also to sustain this new emergence of on-demand publishers,
213
632680
4856
10:37
like QOOP, who produced these two books.
214
637560
2296
10:39
And I think one of the things that you should take away from this talk
215
639880
3286
10:43
is that there's an impending cut-out-the-middle-man disintermediation,
216
643190
4026
10:47
that's going to be happening in the publishing industry.
217
647240
2656
10:49
And it's going to reach a crescendo over the next few years,
218
649920
2856
10:52
and I think that it's for our benefit, really, and for the world's benefit.
219
652800
3816
10:56
OK, so what are the enablers?
220
656640
1656
10:58
What's really making all of this happen?
221
658320
1936
11:00
There's tons of technology,
222
660280
1616
11:01
and the only piece of technology that I really want to talk about is XML.
223
661920
3856
11:05
How many people know about XML?
224
665800
1736
11:07
Oh, great.
225
667560
1216
11:08
So it's the future of the web, right?
226
668800
1776
11:10
It's semantic representation of content.
227
670600
4376
11:15
And what you can really think of XML in this case
228
675000
2376
11:17
is it's the packaging that we're putting around these pages.
229
677400
2896
11:20
Remember we took the book, tore the pages out?
230
680320
2256
11:22
Well, what the XML is going to do
231
682600
1896
11:24
is it's going to turn those pages into Lego blocks.
232
684520
4336
11:28
XML are the nubs on the Lego
233
688880
1896
11:30
that allow us to combine the content together in a myriad different ways,
234
690800
4056
11:34
and it provides us a framework to share content.
235
694880
3496
11:38
So, it lets you take this ecosystem
236
698400
3296
11:41
in its primordial state of all this content,
237
701720
2576
11:44
all the pages you've torn out of books,
238
704320
1858
11:46
and create highly sophisticated learning machines:
239
706202
3974
11:50
books, courses, course packs.
240
710200
2736
11:52
It gives you the ability to personalize the learning experience
241
712960
3696
11:56
to each individual student,
242
716680
1696
11:58
so that every student can have a book or a course
243
718400
2656
12:01
that's customized to their learning style, their context,
244
721080
3456
12:04
their language and the things that excite them.
245
724560
2736
12:07
It lets you reuse the same materials in multiple different ways,
246
727320
3616
12:10
and surprising new ways.
247
730960
1976
12:12
It lets you interconnect ideas,
248
732960
1936
12:14
indicating how fields relate to each other.
249
734920
4176
12:19
And I'll just give you my personal story.
250
739120
2256
12:21
We came up with this six-and-a-half years ago
251
741400
2496
12:23
because I teach the stuff in the red box.
252
743920
2616
12:26
And my day job, as Chris said -- I'm an electrical engineering professor.
253
746560
3776
12:30
I teach signal processing
254
750360
1656
12:32
and my challenge was to show that this math --
255
752040
2536
12:34
Wow, about half of you have already fallen asleep
256
754600
2336
12:36
just looking at the equation.
257
756960
1456
12:38
(Laughter)
258
758440
1176
12:39
But this seemingly dry math
259
759640
1456
12:41
is actually the center of this tremendously powerful web
260
761120
4336
12:45
that links technology --
261
765480
1696
12:47
that links really cool applications like music synthesizers
262
767200
3736
12:50
to tremendous economic opportunities,
263
770960
3136
12:54
but also governed by intellectual property.
264
774120
2136
12:56
And the thing that I realized
265
776280
1416
12:57
is there was no way that I, as an engineer,
266
777720
2256
13:00
could write this book that would get all of this across.
267
780000
2620
13:02
We needed a community to do it
268
782644
1429
13:04
and we needed new tools to be able to interconnect these ideas.
269
784097
4039
13:08
And I think that really, in a sense, what we're trying to do
270
788160
2856
13:11
is make Minsky's dream come to a reality,
271
791040
1976
13:13
where you can imagine all the books in a library
272
793040
2256
13:15
actually starting to talk to each other.
273
795320
1936
13:17
And people who are teachers out here -- whoever taught, you know this --
274
797280
3696
13:21
it's the interconnections between ideas that teaching is really all about.
275
801000
4496
13:25
OK, back to math.
276
805520
2056
13:27
Imagine -- this is possible:
277
807600
2496
13:30
that every single equation that you click on in one of your new e-texts
278
810120
4576
13:34
is something that you're going to be able to explore and experiment with.
279
814720
3736
13:38
So imagine your kid's algebra textbook in seventh grade.
280
818480
3536
13:42
You can click on every single equation
281
822040
1896
13:43
and bring up a little tool to be able to experiment with it,
282
823960
2856
13:46
tinker with it, understand it.
283
826840
1856
13:48
Because we really don't understand until we do.
284
828720
2736
13:51
The same type of mark-up, like MathML, for chemistry.
285
831480
4176
13:55
Imagine chemistry textbooks
286
835680
1296
13:57
that actually understand the structure of how molecules are formed.
287
837000
4216
14:01
Imagine Music XML
288
841240
1936
14:03
that actually lets you delve into the semantic structure of music,
289
843200
3416
14:06
play with it, understand it.
290
846640
1816
14:08
It's no wonder that everybody's getting into it, right?
291
848480
3176
14:11
Even the three wise men.
292
851680
1256
14:12
(Laughter)
293
852960
1176
14:14
OK, the second big enabler, and this is where I told a big lie.
294
854160
5536
14:19
The second big enabler is intellectual property.
295
859720
3136
14:22
Because, in fact, I got up here
296
862880
1496
14:24
and I talked about how great the music culture is.
297
864400
2336
14:26
We can share and rip, mix and burn, but in fact, that's all illegal.
298
866760
3616
14:30
And we would be accused of [piracy] for doing that,
299
870400
3376
14:33
because this music has been propertized.
300
873800
3336
14:37
It's now owned, much of it by big industries.
301
877160
4296
14:41
So, really, the key thing here is we can't let this happen.
302
881480
2762
14:44
We can't let this Napster thing happen here.
303
884266
2710
14:47
So, what we have to do is get it right from the very beginning.
304
887000
2953
14:49
And what we have to do is find an intellectual property framework
305
889977
3399
14:53
that makes sharing safe and makes it easily understandable.
306
893400
5056
14:58
And the inspiration here is taken from open-source software.
307
898480
3816
15:02
Things like Linux and the GPL.
308
902320
3576
15:05
The Creative Commons licenses.
309
905920
2381
15:08
How many people have heard of creative commons?
310
908325
2191
15:10
If you have not, you must learn about it.
311
910540
1956
15:12
Creativecommons.org.
312
912520
1576
15:14
At the bottom of every piece of material in Connexions
313
914120
3336
15:17
and in lots of other projects,
314
917480
1856
15:19
you can find their logo.
315
919360
1576
15:20
Clicking on that logo takes you to an absolute no-nonsense,
316
920960
3576
15:24
human-readable document, a deed,
317
924560
3136
15:27
that tells you exactly what you can do with this content.
318
927720
2667
15:30
In fact, you're free to share it, to do all of these things:
319
930411
3605
15:34
to copy it, to change it, even to make commercial use of it,
320
934040
3056
15:37
as long as you attribute the author.
321
937120
2896
15:40
Because in academic publishing and much of educational publishing,
322
940040
4416
15:44
it's really this idea of sharing knowledge
323
944480
4336
15:48
and making impact.
324
948840
1296
15:50
That's why people write, not necessarily making bucks.
325
950160
3856
15:54
We're not talking about Harry Potter, right?
326
954040
2096
15:56
We're at the long tail end here.
327
956160
1696
15:57
Behind that is the legal code, very carefully constructed.
328
957880
4656
16:02
And Creative Commons is taking off --
329
962560
1856
16:04
over 43 million things out there,
330
964440
4136
16:08
licensed with a Creative Commons license.
331
968600
2096
16:10
Not just text,
332
970720
3096
16:13
but music, images, video.
333
973840
2496
16:16
And there's actually a tremendous uptake
334
976360
2016
16:18
of the number of people that are actually licensing music
335
978400
3456
16:21
to make it free for people who do this whole idea of re-sampling,
336
981880
3216
16:25
ripping, mixing, burning and sharing.
337
985120
2136
16:27
OK, I'd like to conclude with just the last few points.
338
987280
3696
16:31
So, we've built this idea of a commons.
339
991000
2376
16:33
People are using it.
340
993400
1896
16:35
We get over 500,000 unique visitors per month, just to our particular site.
341
995320
6296
16:41
MIT OpenCourseWare, which is another large open-content site,
342
1001640
4056
16:45
gets a similar number of hits.
343
1005720
2216
16:47
But how do we protect this?
344
1007960
1656
16:49
How do we protect it into the future?
345
1009640
1776
16:51
And the first thing that people are probably thinking
346
1011440
2736
16:54
is quality control, right?
347
1014200
1616
16:55
Because we're saying that anybody can contribute things to this commons.
348
1015840
4696
17:00
Anybody can contribute anything.
349
1020560
2816
17:03
So that could be a problem.
350
1023400
2536
17:05
It didn't take long until people started contributing materials,
351
1025960
4216
17:10
for example, on lingerie,
352
1030200
2136
17:12
which is actually a pretty good module.
353
1032360
1976
17:14
The only problem is it's plagiarized from a major French feminist journal,
354
1034360
5576
17:19
and when you go to the supposed course website,
355
1039960
2816
17:22
it points to a lingerie-selling website.
356
1042800
4176
17:27
So this is a little bit of a problem.
357
1047000
2176
17:29
So we clearly need some kind of idea of quality control
358
1049200
3056
17:32
and this is really where the idea of review and peer review comes in.
359
1052280
3696
17:36
You come to TED. Why do you come to TED?
360
1056000
1905
17:38
Because Chris and his team have ensured
361
1058400
2415
17:40
that things are very, very high quality, right?
362
1060839
3177
17:44
And so we need to be able to do the same thing.
363
1064040
2416
17:46
And we need to be able to design structures,
364
1066480
3056
17:49
and what we're doing is designing social software
365
1069560
3056
17:52
to enable anyone to build their own peer review process,
366
1072640
3096
17:55
and we call these things "lenses."
367
1075760
1816
17:57
And basically what they allow
368
1077600
1416
17:59
is anyone out there can develop their own peer-review process,
369
1079040
3416
18:02
so that they can focus on the content in the repository
370
1082480
3976
18:06
that they think is really important.
371
1086480
1715
18:08
And you can think of TED as a potential lens.
372
1088219
3277
18:11
So I'd just like to end by saying:
373
1091520
1777
18:13
you can really view this as a call to action.
374
1093321
4655
18:18
Connexions and open content is all about sharing knowledge.
375
1098000
4976
18:23
All of you here are tremendously imbued with tremendous amounts of knowledge,
376
1103000
5016
18:28
and what I'd like to do is invite each and every one of you
377
1108040
2776
18:30
to contribute to this project and other projects of its type,
378
1110840
3216
18:34
because I think together we can truly change the landscape
379
1114080
3776
18:37
of education and educational publishing.
380
1117880
2216
18:40
So, thanks very much.
381
1120120
1200
About this website

This site will introduce you to YouTube videos that are useful for learning English. You will see English lessons taught by top-notch teachers from around the world. Double-click on the English subtitles displayed on each video page to play the video from there. The subtitles scroll in sync with the video playback. If you have any comments or requests, please contact us using this contact form.

https://forms.gle/WvT1wiN1qDtmnspy7