Nowadays the smart phone game is very popular.Many students like playing smart phone game.I think it is good for students.It can make students relaxed after studying for a long time.And it also help some children who don't like talk with or have an interactive with others.I also think playing games is bad for students.For example,it is bad for students' eyes when played for a long time.It also make students like playing games instead of studying. I think students aren't allowed to play phone games at school.Because it can make students don't listen to teacher carefully.