The most common problems with student behavior in school are disruption of classes, fighting, and disrespectful attitudes towards teachers and classmates. These problems can stem from a variety of factors, such as home life, peer pressure, or personal issues.   Disruption of classes is one of the most common problems because it prevents other students from learning. It can be caused by talking out of turn, not paying attention, or horseplay. Fighting is another common problem that can lead to serious consequences, such as suspension or expulsion. It often occurs when students don't agree on something or feel threatened by someone. Finally, disrespectful attitudes towards teachers and classmates can make the learning environment unpleasant for everyone involved.