To control students' classroom behavior with positive reinforcement From a sample of 40 Mathayom 1 students before the experiment, it was found that students with negative behavior while the teacher teaches They would talk with friends in the classroom until they lost focus on the lesson. However, after experimenting with the technique Positive reinforcement was given to students and it was found that those students behaved in a better way and were more involved. in organizing more activities in front of the classroom Making learning management in the classroom more educationally effective and creating a better atmosphere in the classroom. Convenient and conducive to good learning management and Create a good atmosphere in the classroom to encourage students to be more interested in the lesson and behave in a more positive way. The importance of using this supplementary technique is So that students can concentrate more on the lesson. The researcher is therefore interested in solving this problem by making students behave better. As a result, the researcher can control and manage it.