Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good DVD assistance, classroom substitution.

Taking an online Calculus course is difficult, (Looking at examples in a book, trying to comprehend it, using reference to solve problems.) This DVD is a good tool to assist in the basic concepts. Nothing can beat an interactive classroom experience, but this could be a close second.Note: The DVD is not gonna get upset if you keep repeating a section until you can comprehend the material! (Unlike professors and classmates.) Also, great review for previous material prior to taking tests.