And the class is studying. Things to do in addition to teaching. We would talk, eat, sleep or talking on a cell phone. So it is not appropriate to you. And a demonstration of disrespect teachers. I respect what they're studying. And without respect to time and place. Phone use has become a problem of education. Guidelines are possible, namely the regulation of the use of mobile phones in schools, such as the ban on the audio during the lessons. To be used in class or break time only. Or determine the age of the students who can carry out the study. This can be a solution to the problem of cell phone use during class time, more or less