hello, i'm a math teacher. i learn spanish with your engine and its perfect for math for the first 6th grades.
do you have one engine for math? if not, if you give me your code, i'll put math content inside and you could use it freely! the whole world needs you...
save children from their horrible books.. please..
Foofi, I had the same idea even before I discovered duolingo. The gamification duolingo uses would be excellent for mathematics, physics, chemistry, or almost any other subject as well. I believe a revolution in teaching could be on the horizon if someone decides to put in the work.