I don't use textbooks. Well, let me rephrase, I don't let the kids use textbooks. I'd like to know when the authors of these things last spent time with a teenager. I keep them around as jumping off points for my lessons as sometimes I'll forget about detail x or special case y of a given concept. The college professors I had who didn't use the book were the ones I liked the most. It can be a useful bit of reference material, but a teacher and his/her students should not sit around waiting for direction from the almighty textbook, because of garbage like this:

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I'm fine with the what, but the why is maddening. The whole reason I should learn about limits at infinity is so that I can do one of your example problems? Shouldn't you point out that producing an infinite number of products is a) impossible b) unlikely and oh yeah, c) impossible?

Posted
AuthorJonathan Claydon