A teacher’s ability to manage a classroom effectively is referred to as:

Classroom management refers to the wide variety of skills and techniques teachers use to ensure an orderly, focused, and productive learning environment. It involves organizing students, maintaining discipline, and maximizing instructional time.

• Instructional leadership typically describes the role of school administrators in guiding teaching practices, not a teacher's direct classroom control.
• Pedagogical knowledge is the understanding of teaching methods and strategies, but doesn't specifically denote the management aspect.
• Student engagement is an outcome of effective teaching and management, rather than the ability to manage itself.