Whats so hard to figure out? Look at the homework, class time, etc. Those who usually fail to do all of it, probably cheated. When I was in School, I never did homework, but If you randomly called me up, and asked me a question out of the blue, I knew the answer. I just never felt like going thru the hassles of homework, if I already knew it. Now When I did do the homework was when the subject was foreign to me, and I did it to learn it.