If your school has official website, click on the educational administration system of the school website, enter your student number and password, select your identity, then enter another interface, click the query result, and then enter another interface, select the time, department, class and subject, and click Query. But I suggest that you don't choose subjects, you can directly check the grades of all subjects in the class. If the school doesn't have a website or its own internet access conditions don't allow it, call the teacher.