and in physical classrooms, havingdialogue, doing projects, getting feedback from your peers. teacher can be the human in the child's life and sit next to them and really intervene, get to know them better. figure out not just what the content gaps are, but what are their emotional needs? what is going on at home. there is this whole body of research that says if you have a growth mindset, you realize that your brain is trainable. that if you just push yourself, if you stay out of your comfort zone, you can make yourself 'smarter,' so to speak. emily: you guys actually have a new classroom that you set up at the khan academy where you are testing a lot of different things. tell me about this. sal: it is always been a dream of mine, even before khan academy existed. wouldn't it be fun to be a mini-dumbledore and experiment with these ideas. we should have a small lab where we can test some of these ideas. where we can test some of these ideas on what could a classroom be. emily: who are these kids, how many kids? sal: my eldest son is one of the guinea pigs. a lot of the kids a