First of all,you should listen careful in the classes and take some nates about the subject.Then,you should do your homework by yourself instead of copy other's homework.If you have free time,you could do some exercises to improve you study.You also should love your class.For example,you can sweep the floor for class.
A good student,I think,should be hard in his studies.The more he studies,the more he will increase his knowledge.Without enough knowledge,we can not make great contributions to the modernization of our country.
To take care of one's own body is another important thing for good student to do.Anyone,who hasn't got a strong body,can do nothing for his country,even if he has much knowledge.There was a man,who,when he was student,studied hard but neglected his health.No sooner did he come to serve the country than he died of poor health.From this we may see that to have a strong body is really very important for a student.