Mark Zuckerberg on Taking Risks and Finding Talented People

The terms mastery learning are used a lot these days, but I want to do a video on them because they can mean different things to different people. I want to talk about what it means, at least in a Khan Academy context. So to give us some perspective, let…

What we’re going to do in this video is discuss some of the foundational ideas for the United States of America. We could start at the most foundational of ideas, and that’s the notion of natural rights. John Locke, one of the significant Enlightenment th…

Let f and g be the functions defined by ( f(x) = 1 + x + e^{x^2 - 2x} ) and ( g(x) = x^4 - 6.5x^2 + 6x + 2 ). Let R and S be the two regions enclosed by the graphs of f and g shown in the figure above. So here I have the graphs of the two functions, and …

Let’s say we wanted to figure out what (3 \frac{7}{3}) minus (-\frac{7}{3}) minus (\frac{11}{3}) is. Pause this video and see if you can have a go at it before we do it together. All right, now let’s work on this together. You might be tempted to deal wi…

You can never see anything enter a black hole. (bell dings) Imagine you trap your nemesis in a rocket ship and blast him off towards a black hole. He looks back at you shaking his fist at a constant rate. As he zooms in, gravity gets stronger, so you woul…

What’s up you guys? It’s Graham here! So lately, I’ve had quite a few people bring this to my attention, so much so that I felt I should make a video about it explaining exactly what’s going on in the entire situation. Because when you see a title like th…