I hated this guy's class. Apparently he's some kind of math education genius. I do remember liking geometry, so maybe it worked.
But I'd like to mention how much I particularly disliked one thing the writer mentions as a positive: that this teacher pushes students hard, then "lifts the mood with some lively intellectual jousting on nonmath topics, such as sports, that he knows interest them."
Yeah. I challenge anyone to come up with a way to get the 13-year-old me to hate a class more than breaking up the MATH with FOOTBALL.