Classroom management involves organizing the classroom to minimize behaviour problems and maximize learning. Well-managed classrooms have student engagement, clear expectations, effective time management, and positive environments with firm discipline. Classrooms are complex places with many simultaneous and unpredictable events. Overcrowded classrooms with more than 30 students can increase discipline issues and noise while decreasing personal connections and struggling students' performance. Teachers must cope with unexpected events, unmotivated students, disrespect, lack of parental involvement, technology misuse, and unmet student needs through excellent planning, engagement, structure, humor, and asking for help when needed.