字幕列表 影片播放 列印英文字幕 - Hi everyone, Sal Khan here from Khan Academy. Welcome to our Daily Homeroom. For those of y'all who are new to this, this is something that we started doing a few weeks ago as we started seeing the mass school closures and obviously Khan Academy, we're a not-for-profit with a mission of providing a free world class education for anyone, anywhere. And we realized that as the schools were closing, we wanted to put our resources together so they could be as useful as possible for you, the student, the teacher, the parent. And we also wanted to provide more supports especially since all of us are now socially distanced, so that we can feel connected, so that we could answer each other's questions, so that we can support each other. And so we've been running teacher webinars, parent webinars and we have been doing this Daily Homeroom which is just a way to connect, talk about whatever y'all have on your mind and to have interesting guests. Now before we get into the meat of the homeroom so to speak, I will say what I always say, a reminder that we are a not-for-profit. We are funded with philanthropic donations. We were running at a deficit, even before this COVID crisis hit and now our traffic is about 2.5X, 3X of what it typically is and so our costs have gone more and we wanna provide more supports. So if you are in a position to do so, please think about donating to Khan Academy. I do wanna give special thanks to several corporate partners who have stepped up in the last few weeks, really in record time, to help Khan Academy with this effort. Bank of America, Novartis, Google.org, AT&T and of course there's many other long-time supporters but we still need more help. We're still digging into our reserves in order to stay operational. So now that I've given you my plug, I wanna introduce our guest. You know, we've had a lot of questions about all things academic. How do we keep learning in math? How do we keep learning in the humanities and how do you keep learning in foreign language? And so I have today, Luis von Ahn, a old friend of mine who is the founder, CEO of Duolingo. Many of y'all might be familiar. It's a place, it's an app, where you can learn languages for free. But I don't know, Luis, you're more qualified than I am. Tell me about what y'all do at Duolingo. - Well thank you for having me, Sal. And thank you for this initiative. It's great that you guys are doing it. Well at Duolingo, I mean, we teach languages, that's the main thing we do. You can either do it online in a computer at Duolingo.com or you can download an iPhone app or an Android app. It's free to learn, it's entirely free to learn and you can learn as much as you want for free. And the other thing is that we spend a lot of time making sure that it's fun to learn a language with Duolingo. So it feels a lot like you're playing a game when you're learning on Duolingo. We've worked really hard on that. - And I can see, we're seeing some screenshots now from Duolingo. And Luis, I guess, how were people using Duolingo before? Was it being integrated with your kind of traditional you know, high school classes in languages or is it mainly adults who are trying to learn maybe for a business trip? And how are you seeing the usage change since the crisis began? - Yeah, I mean, we have a ton of users. I mean, we have over 300 million users worldwide. It's all over the place. The age range is from you know, six, seven, eight years old to 90 some years old. There's, as far as we know, we don't know for a fact because we don't really track this, anybody can really use Duolingo, but as far as we know about 25% of our language classrooms in the U.S. Use Duolingo in one way or another. So we do have a lot of student users but we also have a lot of adult users who are just you know, wanting to improve on their high school French or something. Since everybody's been staying at home, we've seen our usage go up quite a bit. And you know, our user base is pretty global, only about 20% of our users are in the United States. And one thing that's been interesting is pretty much every country, as soon as they apply their social distancing measures, we see traffic increase about one or two days after that. And it depends on the country. In some countries it has more than doubled, in some countries it has gone up by 50%, it kinda depends on the country, but we've seen that. The first country obviously where we saw that was China. About three months ago, basically the traffic in China doubled and it's remained like that. So you know, I don't know what that means. A lot of China's back to normal or mostly normal yet our traffic remains essentially twice what it was before. - And what do you think is underlying that? Let's say China for example, I am curious what language are folks learning? Is it all languages, is it English? And then what do you think is the motivation? People are like, "I'm home, I might as well do something productive." Or is there other motivations? - I think there's both. I think there's a lot of kids who had to be in school and now are home and they're trying to figure out how to you know, how to learn whatever they used to be learning and a lot of teachers are telling them to use Duolingo. But there's also people who are just bored at home and you know, it used to be the case that they used to go to a restaurant, now that time is being occupied for something else. And they think that you know, improving their lives is an important thing. So I think a lot of people are doing that. In terms of what languages people are learning, it really depends on the country. In most non-English speaking countries, people are learning English. That's the main language that most everybody is learning. In the United States, the biggest language is Spanish, second is French, then German, then Japanese. And then it tapers off quite a bit. From English, you can learn about 35 languages on Duolingo. But some of the smaller ones, you can learn High Valyrian from Game of Thrones, you can learn you know, Esperanto. You can learn a lot of kind of some of the smaller languages but not too many people are learning those compared to Spanish for example. - Is High Valyrian a fully, fleshed out language that like we could have a rich conversation in? - I think so. I think there's a lot of strange things, I think it has a lot of different words for things like "sword" or stuff like that. - Yes, as we know Eskimos have six words for ice so I guess. - Let me tell you something else which I don't know what this says about the world. When the seasons were on for Game of Thrones, there were more people learning High Valyrian on Duolingo than there were people learning Irish for example or Scottish which, yeah, I don't know what this says about the world but that was the case. - Fascinating, fascinating. And what's your sense? So now there's a lot of parents and adults who you know, I have always had aspirations to get better at certain languages or learn certain languages. What's your general advice there? I guess this advice would carry over even if we weren't in this crisis situation. Where do you think Duolingo's really strong and then what would you supplement that with if you really were trying to you know, get conversational in Spanish or English or some other language? - Yeah, I mean I think, well the first thing to know about learning a language is it takes a while you know? There's a lot of you know, kind of fake news marketing out there that says you can get fluent in a language in nine days or whatever, this is just not true. It'll take years to get really fluent in a language. You can get a lot of progress in a few months but if you really, really wanna get very advanced in a language, it takes years. So the first thing I think you gotta do is build a habit as with most everything else. So if you build a habit you know, spend 15, 20 minutes a day using Duolingo and you do it over a long period of time, you get quite good at it. You know, things I would recommend, once you get to a point where you've done about half the Duolingo course or maybe a little more than that, I would recommend watching you know, you can watch Netflix in you know, Spanish or shows in other languages, I would recommend watching those. A lot of times you can watch them with the subtitles. Now try watching them with the subtitles in the language you're learning, not in English because then you just won't pay attention. But if you watch with the subtitles in Spanish too, I think that's a pretty good way to get much better at you know, after you do Duolingo. But you can't quite start by doing that because it's pretty hard to understand the things. - Yeah, and I remember that I used to watch these Spanish dramas when I was trying to learn Spanish. It is effective. And you've touched on some questions you know, from Instagram. Sanoff_7 asks, "How do you establish a habit "of learning everyday?" You just mentioned the importance of habit. What do you recommend for people who are trying that? - Yeah, well one of the important things, I think, is to do it everyday at the same time, that helps. If you just for example, personally the way I do it is basically as soon as I wake up. Kinda the first thing I do is do my Duolingo. If you pair it with something else, it's like, "Well, "I'll do it right after I brush my teeth," or "I'll do it "right after lunch," and do it at the same time everyday, that seems to really help. Another thing is that it's the first maybe 20 ish days that really matter. I mean, we see it in our data. If we can get you to come back consistently for about 20 days, then you'll come back to Duolingo for very long periods of time. So you just gotta try to stick to it for about 20 days. - I see, and we have some questions for you in particular you know, from YouTube. Reverend Hogwash is asking, "How many languages "does Luis speak?" And you just mentioned that you are still learning languages, so I'll extend that. Not only how many do you speak but what are you trying to learn right now? - Okay, I will say I am relatively good at English, I am relatively good at Spanish, about the same, English and Spanish. I'm pretty good at Portuguese, not quite as good as English but almost, and then I am intermediate beginner in French. The pronunciation is my nemesis for French. - And what are you trying to learn right now?