Talk to your teacher! Ask questions during class or meet with your teacher before or after school if you need additional assistance!
Budget your time carefully - leave yourself plenty of quality time to complete your homework. Use any free time you have to seek out additional help.
Review your notes/what you learned in class today. Do you understand the terms used? Can you summarize what you learned? Do you really understand, or are you just regurgitating what the teacher said?
Questioning: Did you ask clarifying questions? What questions do you have for the teacher the next day? Make note of them and get them answered.
Study with a partner! This will help you realize what information you really don't understand.
Be an active learner. Studying for a test does not mean reading your notes or reviewing your textbook multiple times. Active study means organizing your notes and/or readings by making a Table of Contents Sheet, Study Sheets and/or Flash Cards and then reciting the information out loud. You must do more than just read over your notes to insure retention. When you simply read over notes, you are only using your eyes. When you recite out loud, you are using your eyes, ears and voice. This is triple strength learning.
If you are absent . . . take the time to learn what you missed. Check in with your teacher upon your return to class!