In the sports meeting, class meeting and so on when the class has activities, actively participate. If you feel that you are not strong enough, you can help the class leaders to find information.
When others denigrate the class group, there is a collective consciousness to defend the honor of the class group from others.
In fact, there are many and many behaviors of loving the class, and each person shows it in different ways. Some people have good grades and can participate in a variety of school or outside competitions to enhance the honor of the class. I'm just expressing my own opinion, that's different from person to person, you can have an opinion.