because children have to attend school until they are 16,our classes are crowded with troublemakers who do not want to be there. these troublemakers make it difficult for serious students to get an education. teachers must spend most of their time merely trying to keep the troublemakers under control, rather than actually teaching the good students. By the time a student is 13,it is clear whether he or she is serious about school or is only going to play the fool there. At that age, the troublemakers should be allowed to drop out so that the good students can get on with their education.