Here are free samples of all my books and accompanying audio lectures so that you can get a headstart on your course.  Every sample includes at least one complete lesson from my books and audio (usually about 100 pages and 5 or 6 hours of audio), allowing you to try my materials out for a couple of weeks.

Grant's Book and Audio teaching his Basic Statistics 1 book (60+ hours)

Grant's Book and Audio teaching his Basic Statistics 2 book (50+ hours)

Grant's Book and Audio teaching his Intro Calculus book (50+ hours)

Grant's Book and Audio teaching his Calculus for Management book (50+ hours)

Grant's Book and Audio teaching his Calculus 2 book (40+ hours)

Grant's Audio teaching his Linear Algebra & Vector Geometry book (40+ hours)