The goal of the Math Department is to build mathematical thinking skills, to challenge each student to reach her full potential in mathematics, and to foster an ongoing interest in mathematical principles.

Students can choose from a variety of paths as they complete their twelve required blocks of math over a four-year period. Teachers and deans advise returning students on appropriate course selection; new students take math placement tests.

View the 2022-23 Course Catalog


Stacy Tippens

Director of Instructional Design and Innovation/Co-Department Chair Math/Science

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Stacy Tippens joined Madeira in 2014 as an educational technology specialist. Mrs. Tippens started her career in educational technology in 1997 at a public high school in Omaha, Nebraska and has worked as an information technology specialist for several schools and the Smithsonian Institution since then. She earned a bachelor’s degree in Information Systems Management from University of Maryland University College and a Master of Education in Curriculum and Instruction from George Mason University.  Mrs. Tippens has a passion for instructional design and teaching others to use technology.   She introduced a new audio recording studio to the Madeira community in 2015 and has been helping teachers incorporate Virtual Reality into their curriculum since 2017.   

John Ifft

Math Teacher

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John Ifft came to Madeira for the 2016-17 school year after teaching at Flint Hill School in Oakton, VA for 18 years. During that time, Mr. Ifft taught the entire spectrum of high school math courses, with a specialty in AP Calculus. A Northern Virginia native, he earned both his B.A. and M.A. from the University of Virginia. He enjoys cheering on his Wahoos in all sports! 

Glen Russell

Co-Department Chair Math/Science

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Before landing at Madeira Mr. Russell worked in China for eight years, most recently at the International School of Beijing. In addition to teaching math, Mr. Russell has served as a faculty advisor for a number of clubs and activities including the Duke of Edinburgh International Award, the GSA, Habitat for Humanity, and Student Council. Mr. Russell is originally from Trenton, Ontario and has a B.Sc. from Acadia University, a B.Ed from Nipissing University, and this past spring completed a M.Ed from the University of Toronto.

Josh Singer

Math Teacher

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Josh Singer joins the Madeira Math Department teaching courses across the spectrum in grades 9 through 12. Mr. Singer is a native of the Bethesda/Rockville area, having graduated from Whitman in Montgomery County. He worked at The Charles E. Smith Jewish Day School as well as The McLean School in Potomac where he taught middle and high school math courses in each position. Additionally, Mr. Singer served as Dean of Students at The McLean School in the 2011-2012 school year. Most recently, Mr. Singer worked at The Out-of-Door Academy in Sarasota, FL, continuing to teach math courses in grades 6 through 12. Additionally, he held administrative roles as Dean of Student Life and Dean of Faculty Development. He earned his BA from Skidmore College in Mathematics and continued to earn his MSEd from Johns Hopkins University in the field of School Administration & Supervision. When not at school, Josh loves golfing, running, going to the gym, and skiing!

Lee Walker, Ph.D

Math Teacher

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Dr. Lee Walker joins us as a Math Teacher this year. A graduate of the Darlington School in Rome GA, Lee attended Centre College earning a BS in Physics. After earning a PhD from the University of Florida, Lee researched Electron Magnetic Resonance to study the energetics of photosynthetic organisms. After leaving the lab, he focused on his framebuilding company (Syndrome Cycles) and coaching swimming.  He credits his love for working with kids and that for inspiring him to get back into Academia.  After subbing in Science at Madeira last year, he’s happy to be a part of the Math team!

Yaran Sun

Math Teacher

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Yaran Sun began teaching at Madeira in 2019. She earned a Bachelor's degree in Mathematics from University of Oregon and a Master's degree from Columbia University. She teaches BC Calculus, Advanced Precalculus, Advanced Algebra II and Financial Algebra in addition to coaching Math Team.