First question to ask: What will be cheap enough to scale to billions of users? This question is important because the future of education will look like what m

First question to ask: What will be cheap enough to scale to billions of users? This question is important because the future of education will look like what most people use to get educated, and most people will be in India/China/Africa. The biggest education providers today are Google/YouTube/Quora/Reddit/Stack Exchange. I don't think this will change. These things scale, people want to use them, and they seem to work. [This question is subjective depending on your definition of what education is and what goals it serves]