The Internet has become part of teenager(青少年) life. There is a report on 3,375 students aged from 10 to 18 in seven Chinese cities. It says that 38 percent of them believe they use the Internet often. While most of them get useful information and use the Internet to help their studies, some are not using it in a good way. Many are playing online games too much. A few even visit websites they should not look at Bad things can happen if young people spend too much time on the Internet. In order to help young people use the Internet in a good way, a text book on good behavior((行为)has started to be used in some Shanghai middle schools this term. It uses real examples to teach students all about good ways of using the Internet. It also gives some useful advice too, For exa rle good for studentsto read news or search for helpful information about study: Some students also make online friends. But if you are meeting a friend online, let your parents know. Teachers and parents all think the book is a very good idea, It will teach students how to be a good person in the online world. It will be a guide for teens using the Internet and keep students away from bad sites.