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.