Mindstorms: Children, Computers, and Powerful Ideas, Seymour Papert (Basic Books, 1980). I go to some effort to teach my kids math at home, to the point that they’re generally a year or two ahead of whatever’s happening at school. Most of my reasons are personal and idiosyncratic: I like math, and it’s fun to share my hobbies with my kids. I also despise the way math is usually taught, and want their first encounter with certain beautiful ideas not to be ruined by a teacher who doesn't ...