Mary Ann Warrington is the founder of MathPrivé and a mathematics educator with more than three decades of experience teaching children, training teachers, and designing elementary and middle-school math curricula for some of the most respected independent schools in the country. Her work is rooted in the constructivist tradition of Jean Piaget: children build real understanding when they are invited to reason and invent, not simply memorize.

She has taught at the graduate level at Harvard University's Graduate School of Education, where she designed a mathematics pedagogy course at the invitation of Professor Eleanor Duckworth, and at Wheelock College in Boston. Her approach was shaped by Constance Kamii, the renowned scholar who studied directly with Piaget and with whom she co-authored work on the teaching of fractions. For more than 25 years she has also been a consultant, colleague, and friend to Marilyn Burns, founder of Math Solutions.

Today Mary Ann directs the Math Department at The Town School for Boys in San Francisco and has held math-specialist roles at The Keys School in Palo Alto and Stuart Hall for Boys. She holds a B.A. in Economics from Vassar College and an M.A. in Education from the University of Alabama at Birmingham.

Glenna Wiley brings a warm, child-centered classroom sensibility to MathPrivé. Until recently she served as Lower School Math Specialist at the Town School for Boys in San Francisco, capping years of teaching in respected Bay Area independent schools, including Stuart Hall for Boys, where she taught kindergarten and first grade, and Katherine Delmar Burke's School.

Glenna holds a B.A. from Colgate University and an M.A. from University College London. She and Mary Ann share a conviction that the early years are where a lifelong love of mathematics is won or lost.