Attend your classes daily. This shows the teacher that you want to do well. Be at least five minutes early for class, but always be there on time.
Read your assignments before you discuss them in class. This will make it easier to make comments in class. Comment in class when appropriate. This helps the teacher to notice you.
Complete your homework on time and early. Double check your work before handing it in. Have someone read over your essays to check for mistakes before handing them in.
Study background information when available. This will give you a broader understanding of the subject.
Participate in study groups and extra labs. The group insight will help you to understand the concepts more fully. The extra labs will allow you to apply your knowledge effectively.
Seek the help of a tutor if you are really struggling with a specific subject. This should increase your understanding and the grade you receive.