My car makes a loud, scary, grinding noise, and of course the repair shop is closed until Tuesday — so instead of visiting relatives for the holiday weekend, I get a quiet “writer’s retreat” at home.

If you’re stuck at home, too, perhaps you’ll enjoy this bit of fun…

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6/28 is τ Day.
Tau = τ = one turn around the circle = = 2π = 6.28318…
How do mathematicians celebrate τ Day?
Protest! Share anti-π propaganda.
And eat two pies…

Welcome to the Math Teachers At Play blog carnival — which is not just for math teachers! If you like to learn new things and play around with ideas, you are sure to find something of interest.

Several of these articles were submitted by the bloggers; others were drawn from my overflowing blog reader. Don’t try to skim everything all at once, but take the time to enjoy browsing. Savor a few posts today, and then come back for another helping tomorrow or next week.

In the course of my bloggy spring cleaning, I’ve made some terrible discoveries. Some of my favorite resources have disappeared off the internet. Or perhaps they’ve moved, and I just haven’t found their new homes.

Do you know where these websites went?

A Very Short History of Mathematics

This irreverant romp through the history of mathematics by W. W. O. Schlesinger and A. R. Curtis was read to the Adams Society (St. John’s College Mathematical Society) at their 25th anniversary dinner, Michaelmas Term, 1948.

Want to help your kids learn math? Claim your free 24-page problem-solving booklet, and sign up to hear about new books, revisions, and sales or other promotions.

The Best of Blog project has become the monster that ate my life, but I am determined to finish the thing. [It’s done! :D] Meanwhile, I’m enjoying the chance to explore long-forgotten blog posts. If you’d like a laugh, try some of these…