What if there is no unity in the class?

I suggest that you hold a competition between the whole class and other classes, no matter what kind of competition is good (of course), such as game competition and martial arts competition. As long as you participate collectively and are competitive, it is easy to arouse the collective honor of the class. It is best to have something that can arouse this feeling, such as someone taking the lead. In short, I suggest that it is best to let everyone in the class have a sense of responsibility through competitions, which is more conducive to the unity of the class.