This lot of 6 Abeka Precalculus books includes the Precalculus video manual complete with daily lesson plans and practice exercises answer key, Home Teacher materials for grading sheets and progress reports, student practice exercises, student workbook, solutions key, and teacher quiz/test key. These books are all very clean with very little wear on them. There is no writing in any of the books. This lot would cost over $200 for comparable books through Abeka if bought new. We are a smoke-free home. Thank you for looking. Please check out my other lots, as I am willing to combine shipping if you are interested in more than one lot.