Daniel Bach earned his B.A and M.A degrees in Mathematics from the University of California at Berkeley, specializing in algebraic number theory. He is currently a popular math instructor at Diablo Valley College, having previously taught the subject at Mills College and UC-Berkeley. Dan was head tutor for the Minority Engineering Students Asociation and a Math Specialist at Black Pine Circle Day School, where he coauthored several California Junior High Math Competitions during the 1980s. Dan is the author and programmer of "Dan's Basic Math Clinic," an interactive multimedia courseware in ar...