I had an amazing math teacher in high school who I've kept in touch with for 30 years, mostly through letters about math problems. I recently wrote a book about my friendship with him and how it has evolved over the years. At a conference in Rochester last April, I gave a talk about the book and my friend Tom Swartwout edited it into this little video. I'm posting it as a tribute to my teacher. Thanks Mr. Joffray! If anybody else would like to make a tribute to a teacher that inspired them -- a quick thank-you message to your teacher or whatever -- please feel free to post it as a response to this video. I'm going to aggregate them at http:www.thank-my-teacher.com (under construction). For those interested in the book, you can find out more at http:press.princeton.edutitles8859.html --