Mr. Cushman was a teacher, principal, and superintendent of schools. During this period he was a freelance writer. In 1968 he wrote a workbook centering on math story problems entitled “Comprehend, Compute, and Learn”. Unable to find a publisher, he started his own business. Over 100 workbooks followed in the areas of math, social studies, language arts, and science. A dozen games in the same subject areas were published. In 1974 Mr. Cushman developed the “Flipper” concept and published the “Punctuation and Capitalization Flipper”. The “Flipper” product line now includes over 60 titles with over 5 million “Flippers” in print. Also, Christopher Lee Publications, Inc has published custom “Flippers” on over 50 topics for businesses and schools.