Monday Linkfest

I think my energy for blogging will return once the book (Playing with Math: Stories from Math Circles, Homeschoolers, and Passionate Teachers) is done. I haven't even been reading the blogs on my feedly list regularly. I had to stop to get focused on the book this summer, and then I guess I just wanted a break. I caught up yesterday and today. (My Veteran's Day gift to myself.) Now I need to make a list of everything lovely that I found...

• I often enjoy Gary Antonick's NumberPlay column (each Monday). I especially like logic puzzles, so solving this one should be fun.
• Polar curves in nature... I wonder if the math might help explain the shape?
• This "which would you pick" question is a great intro for expected value for statistics.
• GSWP describes lots of different kinds of critical thinking.
• Fawn Nguyen is brilliant. This is a place-value puzzle that got her whole class thinking hard. 
• I love the Mighty Girl profiles I see on facebook. I wonder if this book they recommend is good: Infinity and Me
• A good article on Steven Strogatz in the classroom, which mentions some very interesting free curriculum.
• Hmm, I wonder if my son would try this maze puzzle, called Ogleboro City ... I'll print it out and see.
• I've played with this problem a little. I want to play with it more. Dan Finkel took the basic problem and posed a bunch of variations. Facinating! It might lead to another math circle topic...
• These gifs are making the rounds on Facebook.
• Henry Segerman makes fascinating mathematical artwork using 3D printing. While honing the description of the piece we'll be featuring in Playing with Math, I can across his 100 prisoners and a lightbulb paper. The puzzle posed seems impossible, but...
• Here's a much easier puzzle from 9gag (found on Facebook).

And I'll end with a request. Would someone please teach me to use a slide rule? I know it's a totally archaic skill, but I think it would help me explain logs to my students.