Is it possible that you just do not test well, even though you know the material? I had that problem at the beginning of school, and the best tip I ever got was to read through the whole test first before even picking up your pencil. Many times you will find hints to answers to one question in another. Then go back through and answer the ones you know. If necessary, read through the questions again. Once you see the material, it often triggers memories from class discussions. If none of this works for you, try talking to the teacher you feel the most comfortable with. Most teachers are willing to help, but if theydon't know you need it, they can't give it to you. Good luck!