@Sue I was fortunate enough to hear Harold speak on two occasions at NCTM annual meetings (1988 & 2003). He along with his book “Math-A Human Endeavor” inspired me to stay in teaching in the 1970s. in 2003 Harold had a book signing session for his Geometry text in the Freeman booth. At the time there was still some discussion about a 4th edition of Endeavor which would include more tech references, but it never happened mostly because of his reluctance to venture into more technology because he was already burned by others who wrote to his dismay blackline masters for Human Endeavor. He like Steve Jobs wanted to have total control to keep the product as elegant as possible and Im sure when he saw what others would doing with “support” material he probably referred to them with a Steve Jobs favorite “This is crap.” But in private only, he was too polite to have done it publicly.

Also, in 2003 I was sitting next to Zalman Usiskin and he whispered to me “Harold is a national treasure.”
-Ihor

I’ve been a big fan since I saw you speak a few years back at Asilomar, and still use the HIMYM Hot-Crazy Scale lesson, and some others as well. Your talk today was rejuvenating and a true highlight for me this year, especially since it is so closely related to one of my areas of interest, and some of the things I’ve done with it. I was planning to speak this year about some of my techniques, but now I’m glad I didn’t because I’ve got some more ideas from your talk and am eager to try them out.
Thanks again!
-Ethan Weker, Orion Academy