I've been working on Playing With Math: Stories from Math Circles, Homeschoolers, and Passionate Teachers for almost five years now. For years I've been saying "It's almost done." I have sometimes felt bad about how long it has dragged out. I'm not sure if the authors (over thirty of them!) trust that the book will really get into print. It will.
Last week I was perusing The World of Mathematics, by James Newman (a lovely four-volume mathematical encyclopedia), so I could write a description of it for my Book Picks section in Playing With Math. He mentioned in the preface that it took him fifteen years to put it together! Ok, now I don't feel so bad.
I've been sending out little updates about my progress on my facebook page for Playing With Math, and mentioned that there today. If you'd like to follow my progress, please 'like' that page.
Now I have something slightly bigger to say, which seems to fit better here on my blog. I'm working on answers to the puzzles Paul Salomon created - his Imbalance Problems. I am stuck on the last one we included. It may be that my brain is fried, and you'll all see an answer easily. But I just don't.
This puzzle was created by one of Paul's fifth grade students, Felix. Can you solve it?
Now I wish I had used these at the beginning of our inequalities unit in pre-calc. They really make you think about what > and < mean! I think I'll hand them out anyway - as a challenge.