Nowadays, with the development of high technology, smart phone is very popular among the high school students. The smart phone once was thought to be forbidden using in the class, now has become very common tool for students. A lot of students keep their eyes on the phone all the time, even in the class, they still check on it. Teachers are upset about this situation, because they feel most students ignoring them when they are passing the knowledge. Some teacher think it is time to let the students hand in their smart phones in the class and after class, these communicational tool will be turned back. I don’t think it is a good idea. Even for the teachers, they count on their phones so much, let alone for the students. The teachers should improve their teaching method to catch the students’ interest.