I can see what the textbook authors intended here, I think. There's not a whole lot of point to memorizing multiplication tables, it's much more useful to be able to work out arithmetic in your head. The way described here (going to multiples of ten and adding) is pretty close to the way I do it (going to prime factors and then multiplying back). Probably the authors wanted to teach what my grade school teachers called "mental math", which sounds like a worthy goal to me.<p>What's impossible to tell without looking at the textbook is, are the parents resisting because they equate math with memorization, or because the textbook fails to teach "mental math"? The article is slanted a bit toward the latter, and I was looking forward to reading it and laughing at the dumb textbook writers along with it, but I'm not so sure.<p>I love the picture on the article, also. The kid, sort of dopey and puzzled-looking, and the father, with the sad look on his face, far in the background, out of focus, powerless to help... It's perfect.