JENSEN’S GRAMMAR DVD SUPPLEMENT By Frode Jensen Master Books 2017 Grades 8 and up New – factory-sealed 3 Hours, 42 minutes Please note that this DVD supplement does NOT replace the worktext. However, it can take the place of having an instructor. High school students who work well independently can be completely guided in this grammar course using the DVD along with their workbook. If you are looking for the complete set, worktext and DVD, we have a separate listing for it. Jensen’s Grammar lessons and exercises were built with three concepts in mind. First, spaced repetition is the key to learning; hence, there is review in every lesson.