I'm sad to learn that Mr. Imes died at a young age (my age now!).  A friend sent me a link to this notice, shortly after publishing a blog today about a lesson he taught us in h.s. trig class at Midwest City H.S. ... Never assume anything! Blog address: www.burkeschannelingbombeck.wordpress.com ... He was great. I'm sorry for your loss, which I'm sure you still feel. Incidentally, I lost my brother in July 2015 to a sudden heart attack. He was only 55. He wasn't a student, so didn't get to enjoy Mr. Imes' class!