Thomas Clark is a life-long teacher of Mathematics and Science with more than 30 years of classroom and tutoring experience at all levels, from elementary through adult. He began his career with twelve years of classroom teaching, including a full year of graduate study, and then served for five years as the State Mathematics Supervisor for the Indiana Department of Education. As a result of all of his experience, he is convinced that everyone has the ability to understand mathematics. The company’s first major program, Algebra: A Complete Course, has, for twelve years, received enthusiastic response from reviewers and users, here in the United States, and in other countries as well. The company’s recently introduced program, Geometry: A Complete Course with Trigonometry is also receiving much acclaim.