Mark Ryan has more than three decades\' experience as a Calculus teacher and tutor.
Ryan is the author of Calculus For Dummies, Calculus Essentials For Dummies, Geometry For Dummies , and several other math books..
He tutors students in all junior high and high school math courses as well as math test prep, and he\'s the founder of The Math Center on Chicago\'s North Shore.
He has a gift for mathematics and a gift for explaining it in plain English.
Mark Ryan has more than three decades\' experience as a Calculus teacher and tutor