Khan is so great for that. Sal's contribution to society is massive. And he's great to listen to. Even at 1.5X speed. :-) Math is funny that way. Miss out on s

Khan is so great for that. Sal's contribution to society is massive. And he's great to listen to. Even at 1.5X speed. :-) Math is funny that way. Miss out on some fundamental aspect and it'll ruin you. And Khan explains some really basic concepts in ways that has given me new perspective or insight.