I talked with someone who did a Japanese startup for learning English. Turns out that while there's an enormous market for learning to do well on English prof

I talked with someone who did a Japanese startup for learning English. Turns out that while there's an enormous market for learning to do well on English proficiency exams (eg, for college entrance)... there was surprisingly little market for learning to actually understand English. There's an enormous market for pre-med/MCAT/med-school training. And surprisingly little for actually understanding biology. As I very fuzzily recall, the bionumbers site grew out of a graduate student shifting domains, and realizing: they had little clue; they needed a rough-quantitative understanding to functionally understand and work in the domain; existing educational content didn't have that as a goal. So they started collecting numbers, and it escalated.