Back in 2008, I read a story about a teacher who used NASCAR to make learning math less painful for his students. Tom Baughman, then teaching the fourth grade, called it “NASCAR Math,” and takes the ...

It's one of those things most people remember from their school days. The angles in a triangle always add up to 180˚. And a right-angled triangle always has one angle that is 90°, so the other two ...