What's the Sweet Spot for Teachers?

Every day, one and a half million or so kids around the world go home from school and doa chunk o homework. A big part of what we're building is an auto grater that takes symbols, equations, up to four or five words we can auto grade. It rests on a type of artificial intelligence that can recognize text or handwriting. And you've said this has the effect of rescuing a lot of valuable data.