Garry Channing, Director of TOH, has enjoyed mathematical thinking Garry Imagefor as long as he can remember and has taught math and mathematical problem solving for nearly twenty years. He got his start in computer programming back in the 1970s by arranging access to the sole computer in his elementary school.  In addition to his work preparing local elementary and middle-school students to compete in Mathcounts, AMC, and Math Olympiads, Mr. Channing has taught calculus and other college-level math and computer science courses to undergraduates at the University of Illinois and Columbia University.  He holds an M.A. in Mathematics from the University of Wisconsin and an M.S. in Computer Science from Columbia University. He also currently serves as Adjunct Professor of Mathematics at Pace University.


Rob Chuckrow has tutored mathematics and physics extensively.  RobChuckrowHe holds a Ph.D. in experimental physics from New York University. Besides teaching physics at NYU, Dr. Chuckrow has opened the world of science to young scholars at The Cooper Union and The Fieldston School.  Dr. Chuckrow is an expert on tai chi, having authored three books on the subject.  His published work on health, exercise and fitness has won several publishing industry awards.



Zhigeng Yang has taught Mandarin Chinese for nearly twenty years and art for nearly a decade. ZhigengCHHSHis fun and engaging teaching style has won him plaudits from students throughout Westchester county, including at Croton Montessori, Croton-Harmon High School, Hua Xia weekend school, and Mt. Kisco Elementary.  Mr. Yang received his CSL training from Nanjing University and Hanban/Confucius Institute and holds a B.S. in International Business from University of Beijing.  Prior to his career in teaching, he was an international businessman.  In addition to his native Chinese, Mr. Yang speaks English and fluent Spanish.


Nicole Channing loves words, word-smithing, grammar, and foreign languages, among other intellectual pursuits. photo-4After retiring from a career in finance, Mrs. Channing home-schooled her daughter and older son in their respective sixth-grade years.  In 2012-13, she held a weekly grammar and vocabulary development group for her older son and his friends and, in 2013-14, developed a series of science Sundays for her younger son and his friends. Passionate about the transformative power of a rigorous education, she has run for the Croton-Harmon School Board and is one of the founding members of the Croton Alliance for Academic Achievement. She holds degrees from Harvard (A.B., Social Studies) and Yale (J.D.), where she honed her editorial skills as executive editor of the Yale Law Journal.