Decrease in the frequency

Ms. Hughes is at her wits’ end with Oran and his clowning around. She has tried scolding them, moving his seat, subtracting points, and giving him extra assignments. There has been no decrease in the frequency of his behavior. She decides to ignore the behavior and put it on extinction, understanding and expecting that the behavior will increase before it decreases. Oran continues the behavior, it continues to be disruptive and makes the other students laugh and talk back to him. She studiously ignores each occurrence and continues lessons and group work through the behavior. But after 2 weeks without any decrease in the behavior, she is giving up.
A. Why is the Teacher’s plan not working? (minimum of 150 words) B. What to do to fix the situation? (minimum of 200 words