This paper presents classroom management practices that can be used to avoid the "revolving classroom door." In the revolving classroom door, misbehaving students are sent to the principal, and eventually returned to the classroom with no gains in student behavior or opportunity for learning. The paper begins by discussing the meaning of classroom management which is defined as how teachers maintain order in the classroom. There follow sections on features and teaching behaviors that must be in place for good classroom management. These include ways to create a positive classroom climate (for example, being friendly and warm, helping students to learn); planning for teaching before school begins, the first day of school, and throughout the year (for example, reviewing and outlining textbooks for each course, posting classroom rules, and reviewing the entire course plan with students the first day); prevention strategies (for example, acting and dressing professionally, teaching standing up and moving around), and consequences and punishments (for example, not ignoring misbehavior problems). The paper concludes with a summary listing of teaching strategies. (Contains 11 references.) (JB)