A phenomenon about students use mobilephne in school This picture showed that in a class,a teacher is write something on the blackboard,and told his students to remenber the formula,because it is going to be the test.Students all hold up their phone and take pictures.No one is use their pen to write.It is a showed a phenomenon that almost every students in school have their own phone, and students often use phone in the class,it has some bad effect,because students will use phone more and use thier pen less,and maybe they will use their phone to watch vedios or play games.And more and more students use their phone in school is because it is convinient.