I had Mr. Edson for both Math Analysis and AP Calculus before graduating in 1996. In my senior year, after I became disheartened with high school, Mr. Edson winked at me and slipped me a note that said, "I believe in you!"
I carried that note in my wallet with me through college and law school in Boston, after which I became an attorney specializing in tax (as math-focused as you can get in the law).
Mr. Edson not only taught me math, he taught me what it was like to be treated with kindness by an amazing teacher, and for that I will always be grateful.
I hope he knew what a tremendous impact he had on his students. He will be sorely missed.