Degrees and Certifications:

Mr. John Leonard

John has been teaching math at Ardsley High School for the past 15 + years.  In addition to teaching at AHS, he coaches both the Girls' and Boys' tennis teams and the bowling team. John lives in Brookfield, CT where he enjoys spending time on and around Candlewood Lake. He's a very proud father of a 15 year son who's very active in sports, competing in soccer, swimming, and baseball for his high school team. John has always enjoyed swimming. He is an avid open water swimmer, participating in many charity swims.


  • Please see my Google Classroom page for current assignments and homework.

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