Students must be penalized for missing classes. Do you know that every day to go to school is a happiness? But many students still miss classes for no reason. Why do students do like that? Maybe there is no penalty, so they quit the classes maybe for their playing or seeing others do. To amend this status, somebody has a suggestion that student must be penalized for missing classes. For me, I absolutely agree with this, because of following reasons. First, this is one of the ways to encourage student attendance and get good grades. Regular attendance and participation in class is critical to a student’s success. Missing classes a lot make them lack of a bunch of information about their subjects. Penalization makes students scared about missing class, so they come to class everyday and keep up work. Knowledge is varied. Even if you are smart, you know a lot of knowledge in many areas, but actually are you sure you know deeply? Teachers who have a wealth of knowledge about specific fields can teach students a lot of useful information and can explain in easy way to understand. They have to lecture in limited time, so they will tell students important points of the lecture may give some tips for exams. If students attended the class, they would be more likely to get good grades easily than others students who didn’t attend to class. Second, penalization makes class more formal and reduces the possibility for students to do bad acting. A class has teacher, students, also has levels who is upper and who is under. You miss class so many times, it means you don’t want to be in this class. Spontaneously you show your disrespect, which makes teachers feel unpleased, unenthusiastic in lecture and affect to others students attending the class. According to a research that the problem of students being absent from school is directly related to crimes of