答案：
One possible version:
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.
一、审题
本篇作文考查体裁为议论文，要求根据同学们的上述观点，并结合自己的亲身体验，就此问题陈述自己的看法。时态可用一般现在时和一般过去时。
二、列举写作要点
1. Would you like to take after-school classes? Why or why not? (Please give 3 reasons.)
2. What would you like to do in your spare time?
3. Please tell us one of your stories of this kind of experience.
三、列出重点短语及句型
It seems that…, used to, not …any more, be interested in, prefer… to…, rather than, spend time doing sth, fall behind, be involved in…, do well in,
