All courses offer opportunities for the student to make wise decisions about the level of understanding achieved. The quality of the mathematical content and instructional use have been thoroughly documented in a wide range of situations and with great numbers of students. Carefully developed, revised, and perfected over the last 25 years, this is mathematics instruction at its finest. 100% 30-day money-back guarantee if not completely satisfied.

Use either the online course or the textbook for instruction. The material and quality of the instruction are nearly identical. Some students prefer a book. Others like the web site. Some students prefer both. Whatever works best is the rule to follow.