Month: March 2012

Proofiness

Read this book! Presidential candidates, and anyone who expects to vote for a presidential candidate, should also read this book. Its subtitle explains the Colbertian word of the title…or does it? Oddly enough, the subtitle changed between the first (hardback)… Read More ›

Predicting answers

Before you start solving a problem, predict what the answer will be. Not necessarily the exact answer; an estimate will do. One strategy that I like (but don’t use as often as I should) is to get students to do… Read More ›

London Under

I first picked up this fascinating book by Peter Ackroyd because I thought it had something to do with the London “Underground,” otherwise known as its subway system. And indeed several parts of the book do concern the Underground. But the… Read More ›

The Last Samurai

Don’t you just hate it when someone writes a book review without having actually read the book? Of course I’m not going to do that…but I do need to give a preliminary comment about Helen DeWitt’s The Last Samurai (not… Read More ›

The distance formula

What are the pros and cons of teaching the distance formula? I can think of two of each: Pro #1: It’s useful and convenient. Pro #2: Future teachers may expect your students to know it. Con #1: It’s nothing but… Read More ›

Khan Academy revisited

Khan Academy used to be a good idea. Maybe it still is; I haven’t made anything like a thorough review of their hundreds of offerings, so it’s impossible for me to tell. But I’m skeptical. Before examining the reasons for… Read More ›

Teaching science through language

We like to claim that linguistics is a science, but I’ve never before seen any explicit discussion of using it to teach scientific principles. An intriguing abstract from Anne Lobeck suggests some possibilities along those lines, particularly pointing out that linguistics… Read More ›

Among Others

I wish I had read Jo Walton’s Among Others when I was a teenager. Since this novel wasn’t written until 2011, I couldn’t have that opportunity. It would have had a big impact on my life. So I had to settle for… Read More ›

Significant figures

Math teachers and science teachers never agree about significant figures — neither about their importance nor about how to use them. Math books and competitions tend to ignore the issue, or else they promulgate arbitrary rules, such as “answers must… Read More ›

The City and the City

What an unusual novel! It’s billed as science fiction, but it isn’t really. It’s more like…well…geography fiction, or government fiction, or some other nonexistent category. This fascinating story takes place in the present day (more or less) in a  fictional… Read More ›