Think about someone you know who is a really good student. Chances are, the person you thought of is not super-smart. Instead, he or she is more likely to be industrious. Good grades come to those who work for them.
You can easily adopt the qualities of a good student. Most "A" students are very organized. They make to-do lists, and then they schedule time to get everything done. They make sure they have the materials they need to do their work. They don't waste time. Organization and time management are important skills for all students.
Good students build good relationships with their teachers. Their teachers know they are serious about learning. Serious students arrive on time for each class. They pay attention in class. They ask and answer questions. Participation in class is important for students who want to make good grades.