The December math education blog carnival is up for your browsing enjoyment:

The carnival is short this month, but full of treats. Enjoy!

*“So here we are on December 23, 2015, the 93rd edition of Math Teachers At Play! As per tradition, what’s so fascinating about the number 93?*

“First, it’s a prime number! No. Wait, that’s clearly false. So 93 is not a prime number. But that’s not very fascinating. Aha! But 93 is a semi-prime! since 93=31×3. Even more interesting is that 94 and 95 are semi-primes. So a question is, is there another triplet of positive integers that are also semi-primes? It’s a good question to ask your students! …”

**Click here to go read the whole post at Math Misery? blog.**

**CREDITS:** “celebrate trees” photo (top) by Lauren Manning via Flicker (CC BY 2.0). Claim your **two free learning guide booklets**, and be one of the first to hear about new books, revisions, and sales or other promotions.