When I was in 10 grade chemistry I had a teacher who was very hard to pay attention to, I would sit in class an just doze off into space. I couldn't pay attention to him because he would just sit at his desk an just rattle off definitions about subjects and at first I tried to write them down but i couldn't keep up with him. So what I would do was before each test I would sit down at night before i went to bed and read the chapter the test was on to myself, and in chemistry there is a lot of math that needs to be done. So when I came across examples in the book I would examine the problems and do each one until I got the same solution as the book. I would do this for probably most of the tests, just like Malcolm X, I taught myself but about chemistry.