And don't assume that things are the same as when you were in school. Asking for the suspension rate is fine. But it is more important to investigate the school's procedure for solving problems. Besides reviewing the school's discipline policies, probe further. Find out if the guidance counselors or assistant principals actually help students work through problems before something serious happens.
Instructors have varying levels of education and specialties.
It's okay to ask about their experience. Also, talk to administrators and instructors about courses they take to renew their certification. It is a good idea, too, to find out how they keep abreast of current education issues. Ask about the teacher's homework assignment philosophy. Some homework assignments may enlist parents' help.