I was sitting on an ottoman in a college chemistry class with the kids I graduated from high school with. The teacher kept doing calculations on the board, but I didn't understand anything. I kept raising my hand and asking for explanations, but he couldn't help me. After class, I went up to ask him what I could do. "My math is weak." I explained. He just gave me a set of homework figures to work on. The frustration was palpable.