Professor Martin has taught mathematics for 30 years. In Part One, "Elementary and Intermediate Algebra," he offers many enrichment subjects or extensions of traditional topics. Included are mediants, logic, incommensurability, different ways to solve equations/ inequalities, applications of exponential functions, different ways to teach variation, and Euler's Totient function. In Part Two, "College Algebra, Trigonometry and Calculus," the same is done at a higher level. Some topics are rational functions, population modeling with and without matrices, four sections on number theory,...