In recent years, with the development of the Internet, more and more school bullying phenomena have been exposed by the Internet, and more and more abusers have apologized and even surrendered to the law under the pressure of public opinion and law. However, it is undeniable that school bullying phenomenon occurs frequently among middle school students, especially junior high school students, and bullying among girls is on the rise year by year. School bullying will not only bring serious physical and mental harm to the victims, but also be detrimental to the cultivation of the healthy personality of the perpetrators. Therefore, the head teacher, as the most important executor of moral education, must take effective measures in daily moral education management to prevent and contain school bullying and promote the healthy growth of teenagers.

Keywords primary and secondary schools; School bullying; Teenagers; Countermeasures

Schools should be the safest harbor for students except their families. However, in recent years, the phenomenon of adolescent school bullying has occurred frequently, which has stung the public's nerves again and again. At the same time, school bullying's methods are becoming more and more complicated, such as collective isolation, speaking ill of others, group beating and humiliation, and cyber siege. Especially, many abusers posted the whole process on the Internet, which made the school bullying case gradually become a social concern. Moreover, the school bullying case not only brought serious physical harm to bullies, victims and even bystanders, but also left an indelible shadow on teenagers' psychology and even their future life. Therefore, as the front line of campus moral education management, the class teacher must take effective measures to prevent problems before they happen.

First, the first measure to prevent school bullying-correcting personality through hobbies.

In an information-developed environment, violent content is common in the Internet, games, movies and novels, and it is inevitable that there will be some individuals.