In view of students' disturbing discipline in class and being naughty after class, the following educational methods can be adopted:

1. Strengthen the sense of discipline: First, let students understand the importance of classroom discipline, and let them know that observing discipline is a manifestation of being responsible for themselves and others. We can strengthen the cultivation of students' discipline concept through classroom teaching, class meeting and other forms.

2. Enhance self-discipline: educate students to learn self-management and restrain their behavior. It can guide students to get ready before class, enter the classroom on time, and don't walk or talk at will. At the same time, students are required to listen carefully in class, not to whisper to their classmates, not to play mobile phones, etc.

3. Establish a reward and punishment system: for students with good performance, you can praise and reward them to stimulate their enthusiasm. Students who violate discipline should be criticized and educated, and given corresponding punishment according to the situation, such as detention and informed criticism.

4. Home-school cooperation: strengthen communication with parents, let parents know their children's performance in school, and jointly urge their children to observe discipline. At the same time, parents are encouraged to strengthen discipline education for their children in family education and cultivate their self-discipline awareness.

5. Pay attention to students' psychology: understand the reasons why students disturb discipline and be naughty after class, and provide targeted counseling. We should pay close attention to students' psychological status and provide psychological counseling and support for violations caused by study pressure and emotional instability.

6. Enrich extracurricular activities: organize colorful extracurricular activities to give students more choices in their spare time, guide them to devote their energy to beneficial activities, and reduce violations in and after class.

7. Create a good learning atmosphere: Teachers should establish a good image of teachers' morality, set an example and strictly abide by classroom discipline. At the same time, we should pay attention to classroom interaction, improve the quality of classroom teaching, stimulate students' interest in learning, and make them willing to abide by classroom discipline.