One of the most difficult things is having students take courses that they can easily pass. Introduction to Computers for example is a very easy class for a computer savvy student. The students think they will not learn anything and then have trouble with engaging in the course. Those students tend to sit in the back of the room and be disruptive. I try to have those people as instructor helpers to keep them engaged and interacting with other students. It also helps the other students get another voice to help explain items that are difficult.