Students go to school everyday, so students need a good class which has three characteristics such as good classmate, teacher, and infrastructure. Students are more exciting to go to class if they can have good classmates. Classmates, who study in the same class, are very friendly and like to help each others. Classmates can become a best friend, or share weal and woe in their life. Moreover, teacher is important person of the class, and we can think teacher is the soul of the class. Teacher has a self- confident, a best knowledge of their subject, and a active voice. The infrastructure is very crucial. Students can feel boring because the class is very dark, small, and humid which is used for a long time without fixing or rebuilding. The more students have the best class, the more they have exciting for studying. Finally, there are three important characteristics of a good class which students need for their study.