Determine your current grade and choose a goal to strive for. Be realistic when setting this goal. If you have only two weeks left in the class, turning a D into an A is not very likely. However, if you got off to a bad start, but there is still plenty of time left in the class, you may be able to achieve a higher goal.
Talk to your teacher. Explain the problems you have experienced that may have caused lower than usual scores or missed assignments. Share your goal with her and ask for ideas. Ask about turning in make-up assignments for missed work, as well as for extra-credit assignments.
Do the make-up work or extra credit that you teacher has suggested. Turn it in as quickly as possible to show that you are serious about doing the work that will improve your grade. Consult your teacher if you run into areas that you do not understand. When working on the assignments, find a quiet place, free of distractions to work. This could be your room or a library. Read all instructions thoroughly and check your work before turning it in.
Take your teacher's advice and work at learning the concepts that give you trouble. A tutor may be helpful. Spend time studying these concepts every night, instead of waiting until the night before a big exam. Use flash cards or multimedia aids to help memorize formulas or other important concepts. You can also give yourself quizzes (which you can make yourself or find online) to help you determine your strengths and weaknesses.
Prepare for upcoming exams by reviewing old tests and looking over your flash cards and other study notes. If you experience test anxiety, discuss this with the teacher and see what options are available. You may be able to take the test orally or in a private location.