What does “With-It-Ness” in Jacob Kounin’s classroom management refer to?

In Jacob Kounin's highly influential theory of classroom management, "With-It-Ness" is a crucial concept referring to a teacher's ability to be constantly aware of everything occurring in the classroom. It signifies the teacher's skill in communicating to students, both explicitly and implicitly, that they are cognizant of their actions, even those that might be subtle or happening simultaneously in different areas of the room. A teacher demonstrating strong "With-It-Ness" can accurately identify and address misbehavior promptly, often intervening before it escalates or spreads to other students. This involves not only knowing who is misbehaving and what they are doing but also intervening effectively and at the right time. Kounin highlighted that students perceive a "with-it" teacher as someone who "has eyes in the back of their head," which serves as a powerful proactive deterrent to misbehavior and is essential for maintaining a smooth, orderly, and productive learning environment.