Some students like to participate actively in after class activities. They think after class activities are an integral part of school life. By going in for such activities, they can learn what they can’t learn from books, which will be beneficial to them in the future. Others, however, don’t like after class activities at all. They think that a student’s work at school is learning theoretical knowledge and nothing else. Taking part in after class activities is a waste of the valuable time at school. In my opinion, every student should engage in some after class activities because from these activities we can learn many valuable things that we won’t learn in the classrooms.Especially for the students of grade nine,I think it's more important to do sports exercise。