This CD is excellent. The only thing that would make me love it more is if it COULD be used as a solutions manual. That's why we loved Teaching Textbooks because every problem in the text was also worked out on the CD for the student to review if they missed a problem. You can't do that with this CD BUT the curriculum is much stronger than TT, that's why we came back to Saxon. Their math curriculum is the best and this CD is a valuable assest to our daughter's daily instruction!!