Dear Editor, IĄŻm a senior high student. Now many students use mobile phones .They think itĄŻs a fashion to use mobile phones .Besides ,itĄŻs very convenient to get in touch with their families and friends by using mobile phones. But some students break the rules in class. They bring their mobile phones to the classroom and we often hear the ring of mobile phones in class. Some of them even waste precious time in class typing short messages on the mobile phones . In my opinion ,the classroom is a place for students to gain knowledge .Therefore quietness is badly needed for us to learn our lessons .Those with mobile phones shouldnĄŻt take mobile phones to the classroom . We are supposed to concentrate on our studies. The school should make a rule to forbid the students to use mobile phones in the classroom. Best wishesĄŁ Yours sincerely Li Hua