There are also pull-ups, which can practice back muscles and arm strength.
As for push-ups, you can do them, but it is not recommended to do too much.
For junior high school students, it is somewhat contradictory to practice upper limb strength too hard and grow taller.
It is suggested that you can go to the playground to do a lot of leapfrog after class at night, which can not only exercise your leg muscles, but also grow taller. Then it is suggested to run and jump more and play basketball, which can not only feel the fun of sports, but also grow taller and stronger, and also exercise basketball skills. For junior high school students, it is recommended to play basketball more.