I really appreciated the sentence following the title, because I was thinking this would be an obituary. And, to make things better, there's an informative and

I really appreciated the sentence following the title, because I was thinking this would be an obituary. And, to make things better, there's an informative and very sweet video interview with him at the end of the article. Even in that, he takes a didactic approach, teaching other teachers how to teach. Whether one likes or dislikes mathematics, it's hard to argue that he was anything but captivating in the classroom.