It seems that many students go to take after-school classes, but it is just a waste of time and money. I used to go to different kinds of these classes, too. But later I realized I couldn't do that any more. I began to spend more time reading, doing sports and taking some social activities. Meanwhile, I didn't fall behind others in study. I prefer to have time to enjoy the nature. It's a wise way to know about the world. So I often put my spare time to good use by watching animals, plants, rocks .around my city. I still remember that day I went to the Forest Park this spring! And I found a few plants appearing in my biology books. It offered me an opportunity to deepen my understanding of my textbooks. Learning by using is a real practice. I have benefited a lot from it. Now I am becoming more creative and confident than those who are always involved in taking after-school classes. 本文来源：https://www.wddqw.com/doc/a02230bcbaf67c1cfad6195f312b3169a551ea4c.html