To refresh your Calculus 1 skills, you could use our CLEP Professor Calculus which is a 3-6 week course that prepares students for the CLEP & AP Calculus AB Exam. If you think you need a more in-depth review, use our Shormann Calculus Self-Paced eLearning Course. This is a 30 week course that features video lectures, interactive homework, auto-grading, grade-recording, video solutions, and Q&A email support with Dr. Shormann.