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

Summary

Luis Von Ahn, co-founder of Duolingo, discusses how his platform aims to democratize education by making it as addictive as social media. He emphasizes equal access to education, inspired by his own experiences in Guatemala. Choosing languages as the starting point due to their direct impact on income potential, Duolingo utilizes mobile technology and a freemium model to reach a global audience. Von Ahn shares strategies the app uses to engage users, such as streak tracking and sophisticated notifications, helping millions become active learners. He hopes that this gamified approach can expand to other subjects, promoting beneficial screen time for everyone.

Highlights

• Luis Von Ahn hails from Guatemala and was inspired to create equal access to education. 🎓
• The decision to start with language learning is driven by its potential to increase income. 💼
• Duolingo uses a freemium model to redistribute wealth, making education free for many. 🌐
• Streaks and notifications are key engagement tools, modeled after addictive social apps. 🔔
• Thousands of memes feature Duolingo's green owl mascot, symbolizing its cultural impact. 🦉

Key Takeaways

• Duolingo makes language learning addictive by using gamification techniques similar to social media platforms. 📱
• The platform operates on a freemium model, providing free education while funded by premium subscriptions. 💰
• Duolingo's approach leads to higher engagement in learning via mobile phones, reaching millions globally. 🌍
• There are more language learners on Duolingo in the US than in high schools combined. 🎓
• Luis Von Ahn hopes to apply similar gamification strategies to other subjects like math and physics. 🔢

Overview

Luis Von Ahn, the co-founder of Duolingo, shared his vision on making education accessible and engaging through his innovative language-learning app. Coming from Guatemala, he witnessed the disparity in educational opportunities firsthand, propelling his mission to democratize learning. Starting with languages, due to their direct effect on economic opportunities, Duolingo has become a game-changer by leveraging smartphone ubiquity.

Duolingo engages learners by employing psychological hooks similar to those used in popular social media apps. Tools like streak tracking and timely notifications motivate users to continuously practice and learn. This method not only keeps users hooked but also helps bridge educational gaps across different socio-economic backgrounds by offering the platform for free, funded largely through premium subscribers who turn off ads.

Luis imagines a future where this approach extends beyond languages to subjects like math and physics, maximizing beneficial screen time. He argues that although educational apps might not be as initially entertaining as social media, they offer meaningful engagement and personal growth, thus driving a substantial number of users to favor productive learning over endless scrolling.

Chapters

• 00:00 - 00:30: Introduction and context about Guatemala The chapter introduces the geographical context of Guatemala, clarifying common misconceptions. The speaker humorously distinguishes Guatemala from Guantanamo, which often leads to confusion. The speaker provides a relatable analogy for Americans, suggesting that Guatemala can be considered 'Mexico's Mexico' due to its location.
• 00:30 - 01:00: Education and inequality in Guatemala The chapter titled 'Education and inequality in Guatemala' opens with a light-hearted remark comparing immigration sentiments in the US towards Mexico and in Mexico towards Guatemala. This sets the stage for a discussion on Guatemala's socio-economic challenges, highlighting its smaller size and poorer status compared to Mexico. Despite being noted humorously for its Mexican food, the narrative takes a critical turn towards the education system. The speaker challenges the common perception of education as a levelling force, suggesting instead that it can perpetuate and even exacerbate social inequalities in the Guatemalan context.
• 01:00 - 01:30: The decision to work on equal access to education This chapter discusses the disparities in access to quality education based on economic status. It highlights how wealthy individuals can afford excellent education, thus perpetuating their wealth, while those with fewer financial resources often receive subpar education, limiting their economic opportunities. The speaker, who despite growing up without wealth, received a high-quality education because their single mother prioritized education and allocated all her resources to it, demonstrating the impact dedicated parental investment can have on educational outcomes. This narrative underscores the need for equal access to quality education to break the cycle of poverty, particularly in impoverished countries.
• 01:30 - 02:00: Choosing the subject of foreign languages This chapter discusses the importance of choosing to study foreign languages and how it can open opportunities for higher education and careers, specifically in the US. The narrator shares personal experiences that led them to pursue a PhD in computer science and later focus on providing equal access to education for everyone. A significant project they worked on in this regard was initiated while they were a professor at Carnegie Mellon University, in collaboration with their PhD student, Severin.
• 02:00 - 02:30: The global demand for learning English The chapter discusses the initial decision-making process of an educational startup regarding which subject to teach first. Despite their personal affinity for math, the founders ultimately chose to focus on teaching foreign languages, noting the global demand for learning English. This decision was based on strategic considerations rather than personal interests.
• 02:30 - 03:00: Economic benefits of learning languages The chapter discusses the economic benefits of learning languages, particularly English. It highlights that there is a large global audience for language learning, with approximately two billion people engaged in it worldwide. Notably, about 80% of these learners are focused on English. The chapter further explains that proficiency in English can dramatically enhance personal income potential in many countries, underscoring the transformative impact of the language.
• 03:00 - 03:30: Choosing mobile phones as the delivery method This chapter discusses why foreign languages, particularly English, are prioritized as they can lead to immediate financial benefits. Unlike subjects like math, which require additional learning in other areas to enhance income potential, language skills alone can improve job opportunities. For instance, a waiter who learns English can work in higher paying environments such as hotels.
• 03:30 - 04:00: Introducing Duolingo and its freemium model The chapter discusses the inception of Duolingo and its freemium model. The founders of Duolingo realized that to reach a large audience, the platform needed to be accessible via smartphones, as building physical schools was too costly. Given that the majority of the world's population has access to smartphones, and this number is expected to grow, they decided to develop a mobile app focused on teaching foreign languages. The chapter highlights the importance of accessibility and scalability in Duolingo's strategy to make language learning widely available.
• 04:00 - 05:00: Wealth redistribution through Duolingo's model The chapter discusses wealth redistribution through the Duolingo model, emphasizing its accessibility. Duolingo employs a freemium model, allowing users to learn without paying but with ads, or opt for a paid subscription to remove ads, thus catering to both rich and poor users.
• 05:00 - 05:30: Challenges of delivering education via smartphones This chapter discusses the financial model of Duolingo, focusing on who subscribes to remove ads in the app. It reveals that the majority of subscribers who pay to remove ads are usually from wealthier countries like the US and Canada, while users from poorer countries such as Brazil, Vietnam, or Guatemala tend not to subscribe. The speaker appreciates this model as a form of wealth redistribution, where wealthier individuals indirectly support access to educational resources in less affluent regions.
• 05:30 - 06:00: Using addictive techniques for educational purposes The chapter discusses the potential of using smartphones to deliver education to a wide audience, even leveraging wealthier individuals to fund this effort. However, it highlights a significant challenge: smartphones also host highly addictive applications, like TikTok and Instagram, which can distract users from educational content. Therefore, delivering education through smartphones is compared to expecting people to choose eating broccoli over indulging in their addictive digital entertainment.
• 06:00 - 06:30: The power of streaks in engagement The chapter highlights the importance of creating engagement through the concept of 'streaks.' It explains how Duolingo effectively uses psychological techniques similar to those used by popular social media and mobile game apps to make learning appealing and enjoyable, akin to making 'broccoli taste like dessert.'
• 06:30 - 07:00: Country comparisons in streak lengths This chapter explores the concept of streaks as a technique used to keep people engaged, particularly in educational products. A streak is a counter that tracks the number of consecutive days a user engages with the product. By prominently displaying this streak count, users are encouraged to return daily, motivated by their ongoing streak.
• 07:00 - 07:30: Role of notifications in engagement The chapter discusses the role of notifications, specifically streaks, in user engagement. It explains how streaks encourage continuous usage by resetting if a user fails to return daily. While streaks have been criticized for potentially fostering addiction, such as among teens using Snapchat, they have proven effective in educational contexts. As an example, Duolingo successfully uses streaks to maintain user engagement, boasting over three million daily active users with streaks exceeding a year.
• 07:30 - 08:00: Impact of stopping notifications The chapter discusses the impact of stopping notifications on user engagement, particularly focusing on streaks in educational apps. It mentions that Japan holds the record for the longest average streaks, whereas Latin America has the shortest streaks. The content highlights the importance of notifications in encouraging consistent user interaction with a product, despite geographical differences in user behavior.
• 08:00 - 08:30: Duolingo's mascot and internet culture This chapter discusses the role of notifications in engaging users with an educational product like Duolingo. Notifications, although often seen as spammy, are crucial in reminding users to continue learning. Duolingo employs a sophisticated AI system to determine the timing and content of notifications to enhance the chances of user re-engagement. Despite the algorithm's complexity, the actual decision-making process behind the timing of notifications is surprisingly straightforward.
• 08:30 - 09:00: Engagement levels of educational vs. entertainment apps The chapter discusses the engagement levels of educational versus entertainment apps, focusing on strategies for sending notifications to users. It emphasizes the importance of timing notifications, noting that the optimal time is 24 hours after a user last engaged with the product, assuming their availability is similar day-to-day. The chapter also highlights the importance of avoiding spamming users with notifications, using Duolingo as an example of an app that stops sending alerts after a week of inactivity.
• 09:00 - 10:00: The broader vision for educational apps In this chapter, the speaker discusses a strategy used by educational apps, such as Duolingo, to address the ineffectiveness of their notifications. They initially stop sending notifications when users are unresponsive but then inform users with a notification that these reminders will cease. The irony is that this approach effectively brings users back to the app, humorously likened to a passive-aggressive tactic similar to those used by parents.
• 10:00 - 10:30: Luis von Ahn's closing remarks Luis von Ahn discusses the effectiveness of passive-aggressive notifications in prompting users to return to the platform, emphasizing the role of their green owl mascot in this strategy. The owl's persistent and somewhat pushy nature has inspired numerous internet memes, making fun of its dedication to encouraging language learning. Luis shares one of his favorite memes as an example.
• 10:30 - 11:30: Discussion on expanding gamification to other subjects This chapter discusses the expansion of gamification into subjects beyond language learning. It uses Duolingo as a case study, highlighting how the app successfully captured popular culture through techniques common in mobile games and social media to engage users. The idea is to leverage similar gamification strategies to make learning other subjects engaging and appealing to broader audiences. It captures the notion that people can be enticed to learn when educational applications adopt proven engagement tactics from other industries.

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

• 00:00 - 00:30 So, I'm from Guatemala. This is a public service announcement, that is where Guatemala is. (Laughter) Also, that is not where they keep the prisoners. That is called Guantanamo. (Laughter) Not the same place. So Guatemala's right below Mexico. And for the Americans in the audience, and let this sink in, because it really applies in most ways, for the Americans in the audience, you can think of it as Mexico's Mexico.
• 00:30 - 01:00 (Laughter) Just like the US doesn't want illegal immigration from Mexico, Mexico doesn't want illegal immigration from Guatemala. It's a smaller country. It's a poor country. And well, what can I tell you, it has much better Mexican food. (Laughter) Guatemala is a very poor country. And a lot of people talk about education as something that brings equality to different social classes. But I always saw it as the opposite, as something that brings inequality.
• 01:00 - 01:30 Because what happens in practice is that people who have a lot of money can buy themselves a really good education and therefore continue having a lot of money. Whereas people who don't have very much money barely learn how to read and write and therefore never make a lot of money. And this is especially true in poor countries. Now, I was fortunate that I received a rich person's education even though I didn't grow up rich. And it’s because I’m an only child. And my mother, who was a single mother, spent all of her resources on my education.
• 01:30 - 02:00 And this allowed me to come to college to the US and eventually get a PhD in computer science. Now because of all of this about 10 years ago, I decided I wanted to do something that would give equal access to education to everyone. Oh, by the way, this is what I want to talk to you about today, giving equal access to education to everyone. At the time, I was a professor of computer science at Carnegie Mellon University, and I decided to work on this with my PhD student, Severin.
• 02:00 - 02:30 The way my brain works, all of education is just too general of a problem. So I decided, let's start by teaching one thing. And then I started thinking, OK, well, what should we teach first? Should we teach math? I mean, we both love math. Me and my cofounder, we both love math. And, you know, we didn't decide to do math. Then we started thinking, well, maybe we should teach computer science. But eventually, and this is maybe surprising to people in North America, eventually, we decided that the best subject to start with was teaching foreign languages.
• 02:30 - 03:00 And let me tell you why. There's a number of reasons. One of them is that there's a huge audience for it. There’s about two billion people in the world learning a foreign language, both in school and outside of schools. Most of these people, by the way, are learning English. About 80 percent of them are learning English. In this weird map right here, all the countries in green are countries in which people are predominantly learning English. And the reason for that is because English can truly transform your life. In most countries in the world, knowledge of English can significantly increase your income potential.
• 03:00 - 03:30 So this is another reason why we decided to start with foreign languages. And it's because you can directly make more money if you learn another language, in particular English. And see, this is pretty different than many other subjects. For example, take math. In the case of math, just knowledge of math does not increase your income potential because usually you have to learn math to then learn physics to then become a civil engineer, that's how you make more money. Whereas with languages, if you are a waiter and you learn English, now you can be a waiter at a hotel and make more money.
• 03:30 - 04:00 So we decided, well, let's get started by teaching languages. Now, we also convinced ourselves that the only way to really reach a lot of people was by using a mobile phone, or a smartphone in particular. See, building schools all over the world is simply too expensive. On the other hand, most of the world's population already has access to a smartphone, and the trend is that that fraction is only going to increase. So we decided at the time that we would make a way to learn foreign languages on a mobile phone
• 04:00 - 04:30 that was accessible to everyone. And then we called it Duolingo. Thank you. (Applause) Now in order to truly be accessible to everyone, rich and poor, Duolingo uses a freemium model to support itself. What that means is that you can learn as much as you want without ever having to pay. But if you don't pay, you may have to see an ad at the end of a lesson. Now, if you don't like ads, you can also pay to subscribe to turn off the ads.
• 04:30 - 05:00 And it turns out that the vast majority of the revenue for Duolingo comes from people who pay to subscribe to turn off the ads. Now, who are these people who pay to subscribe to turn off the ads? Well, they're usually well-off people in rich countries like the US and Canada. Who are the people who don't pay to subscribe? They usually come from poorer countries like Brazil or Vietnam or Guatemala. So what I like about this model is that it is a small form of wealth redistribution because we're basically getting the rich people
• 05:00 - 05:30 to pay for the education of everyone. So I like that. (Applause) So with smartphones, we can reach a lot of people and we can even get the rich people to pay for the whole thing, which is great. However, if you're trying to deliver education with a smartphone, you run into a humongous problem. And it is that smartphones come equipped with some of the most addictive drugs that humanity has ever engineered. TikTok, Instagram, mobile games. See, delivering education over a smartphone is like hoping that people will eat their broccoli,
• 05:30 - 06:00 but right next to it, you put the most delicious dessert ever made. (Laughter) If you really want to deliver education to everyone, not only do you have to make it accessible, but also you have to make it so that people want to actually learn. And with Duolingo, we've been able to do this. And at the highest level, the way we've done this is by making the broccoli taste like dessert. I'll say it another way. What we've done is that we've used the same psychological techniques that apps like Instagram, TikTok or mobile games use
• 06:00 - 06:30 to keep people engaged, but in this case, we use them to keep people engaged but with education. Let me give you some examples of these techniques. One of the most powerful ones is the notion of a streak. What a streak is, is it’s just a counter that measures the number of days that you've used the product consecutively. You just take that number, you put it very prominently in your product and then people come back every day. And the reason people come back every day is because, well,
• 06:30 - 07:00 if they don't come back, that number resets to zero and people don't want to lose their streak. It works. Now, on the one side, streaks have been criticized for, for example, getting teens addicted to Snapchat. But in the case of an educational app, streaks get people to come back to study every day. Now, to give you an idea of the power of streaks, in the case of Duolingo, we have over three million daily active users that have a streak longer than 365. (Applause)
• 07:00 - 07:30 That means they haven't missed a day in the last year or longer. Now, fun fact about streaks. What country do you think has the longest average streaks for an educational app? It's Japan. Of course. Shortest-ever streaks? Latin America, baby. (Laughter) But we're fun, hey, we're fun. (Laughter) Another important mechanism to get people to come back to your product
• 07:30 - 08:00 are notifications. On the one side, notifications can be really spammy and annoying, but in the case of an educational product, people actually want to be reminded to learn. In the case of Duolingo, we have a very sophisticated AI system that basically chooses when to send the notification and also what to say in each notification to maximize the probability that people come back. Now, interestingly, even after all this sophistication, it turns out that the algorithm for choosing what time to send you a notification is pretty simple.
• 08:00 - 08:30 Do you know what is the best time to send people a notification? I'll tell you. It's 24 hours after they used the product last. There's an easy explanation. If you were free yesterday at 3pm, you’re probably free today at 3pm as well. So this is what a very sophisticated millions of dollars of AI found. (Laughter) It's funny. Now with notifications you shouldn't be spamming. And we're not spamming, with Duolingo, we actually stop sending notifications after seven days of inactivity. So if you don't use Duolingo for seven days,
• 08:30 - 09:00 we stop sending you notifications. Now, at some point it occurred to us, if we're stopping to send people notifications, we should let them know. So we started sending this notification to people saying, "Hey, these reminders don't seem to be working. We'll stop sending them for now." You know what people do when they get this notification? They come back. (Laughter) Passive aggressive. (Laughter) Works for my mother, works for Duolingo. (Laughter and applause)
• 09:00 - 09:30 These passive aggressive notifications are really good at getting people to come back back because they feel like our green owl mascot has given up on them, so they come back. And speaking of our green owl mascot, by the way, because all our notifications come from our green owl mascot and well, he's passive aggressive and also pretty pushy, this has given rise to a lot of memes on the internet that make fun of the great lengths that he will go through to get you back to learn a language. Here's one of my favorite ones. This is it's a meme, it’s one of my favorite ones.
• 09:30 - 10:00 (Laughter) Basically looks like you forgot your Spanish lessons. And then there's an intruder alert, presumably the owl broke into your house to get you to learn language. Now, Duolingo has entered the zeitgeist. And there's thousands of memes, there's SNL skits about it. And it's because we've managed to get people to want to learn a language by using the same techniques that mobile games and social media use to get people engaged. And this is a really important point,
• 10:00 - 10:30 let me say this. I don't actually believe that there's a way to make an educational app be as engaging as something like TikTok or Instagram or mobile games. But the good news is that -- And by the way, the reason I don't believe that is because ultimately you have to teach people something. And it's hard to compete with, like, cats and celebrities. But the good news is that I don't think you have to. See, here's the thing. When you're learning something, you get meaning out of it. Whereas when you're scrolling for two hours on Instagram, a lot of times afterwards, you feel like you just wasted your time.
• 10:30 - 11:00 So I think it's actually OK if your educational product is only 80 or 90 percent as engaging as something like TikTok, because the other 10 or 20 percent will be provided by people's internal motivation, though of course, not much more than that. This is really a key point. If we want to get people to do something meaningful, you can use the same techniques that apps like social media use to get people to do it. And even if you're not as engaging as those apps are, you can still get hundreds of millions of people to use your product.
• 11:00 - 11:30 In the case of Duolingo, for example, there are more people learning languages on Duolingo in the United States than there are people learning languages across all US high schools combined. (Applause) And this is true in most countries in the world. My hope is that -- I know we can do this, but, you know, my hope is that as humanity, we can do what Duolingo has done for learning languages but for all other subjects. Where we can get people to learn math with mobile phones, like millions of people to learn math with mobile phones
• 11:30 - 12:00 or physics or whatever. I hope for a future in which screen time is not a bad thing, in which we can deliver high-quality education to everyone, rich or poor, using a mobile phone. But the single most important thing that I can end this talk with, is a reminder to please, pretty please, I beg you, do your language lessons today. Thank you very much. (Laughter) Thank you. (Applause)
• 12:00 - 12:30 Helen Walters: Luis, thank you so much. I wonder if you can just say a little bit more about that last point, how do you think you can apply this type of thinking to other subjects? So you mentioned math, and things like that. How do you do that? Luis von Ahn: I think in particular, subjects that are learned through repetition and it turns out most things that are kind of really meaningful are learned through thousands of repetitions. You learn to read through repetition,
• 12:30 - 13:00 you learn elementary school math through repetition. Most things that you can learn through repetition, you can actually gamify and turn into something like Duolingo, where people just do it a lot and do it fun. It's a little harder for things like explanations. That probably is going to require some really good videos. Sal Khan is doing a really good job with that. But for things that require a lot of repetition, I think we can use the same methods. (Applause)