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Don Davis earned his Bachelor of Science degree in education from Bowling Green State University and his Master of Science degree in mathematics from Ohio University. Don currently teaches at Lakeland Community College in Kirtland, Ohio where he has served as mathematics department chairman, chairman of the college’s excellence in teaching committee, and is a recipient of the college’s Excellence in Teaching Award. In his spare time, Don enjoys the sport of race walking and considers himself an IndyCar and Formula One aficionado.

Bill Armstrong earned his Bachelor of Science and his Master of Arts degrees in mathematics from The Ohio State University. Bill is currently a professor at Lakeland Community College. While at Lakeland, Bill has served as mathematics department chairman, served on numerous committees, started the successful Faculty Liaison Student-Athlete committee, and served as the first advisor for the Actively Caring for People student group. Bill has been a two-time recipient of Lakeland’s Excellence in Teaching Award. When not making videos for his classes or writing, Bill can be found spending time with his wife and beagle, playing pickleball, coaching youth football, or keeping up with Cleveland’s sports teams as well as Ohio State’s sports teams.

Mike McCraith earned his associate's degree at Lakeland Community College, having both Don Davis and Bill Armstrong as instructors. Mike has a Bachelor of Science in Mathematics from Cleveland State University and a Master of Arts in Mathematics from the University of Kentucky. After four years teaching at Joliet Junior College, he is currently a professor at Cuyahoga Community College. When not working on books, Mike thoroughly enjoys snuggling with his huskies, playing video games and studying all things Italian.