Here I have some suggestion. To students, you’d better choose the activities which interest you and suit you; to school, they should organize more activates for students and leave students more time for activates by giving them less home work.
Dear friends, please actively take part in after-class activates, which will not only make your school life colorful, but also improve your learning.
解析：
在写作时，注意把握好时态，应该以现在时态和过去时态为中心，以第一人称为主，词数严格控制在80-120之间，文中可穿插使用一些表示逻辑关系的连词、副词、介词短语、句型等，如，if, when, but, for example, I’m afraid, besides…，做到书写工整，卷面整洁。在有把握的情况下，可以使用一些高级词汇和句式，来为自己的书面表达增光添彩。