there is some of that but mostly they are not taking the time to teach the students. I am in a math class that isnt hard math I just did it for review but the teacher said she would fail 60% of the students. but she is teaching the book so fast that we are going to be done with the book two weeks early. maybe she should SLOW DOWN and teach it to the other students. I am helping the guy that sits next to me and I can hardly keep up with the problems that she is doing and I know how to do them. I feel sorry for the other students. somebody asked her to slow down the other day and she mocked them.