Dr. Stiff is a textbook author for the Houghton Mifflin Harcourt Publishing Company and McDougal Littell. ''Houghton Mifflin Math'' is an elementary textbook series, K-6; and McDougal Littell's titles, such as Math Course 1Algebra 1, Geometry, and Algebra 2, are middle and high school math textbooks. A list of his current textbooks is provided for your consideration. Visit the publishers' websites to learn more about Houghton Mifflin and McDougal LIttell products.

Coming Soon! Algebra 1 instructional videos designed to supplement classroom instruction will be available Fall 2009. In the initial videos, Dr. Stiff will teach the key concepts and skills of Algebra 1. These highly professional videos may be used by teachers or students to promote a better understanding of important algebra content. Supporting written materials will accompany this video product.