We continue our posing of pandigital problems this week with Challenge 10, Part 2. It's available on the front page, and also on our YouTube channel (alongside Challenge 10, Part 1).

We know that it's hard to bring in extension activities as standardized test season rolls around, but as the year comes to a close, please keep Collaborative Mathematics in mind!

Why not spend some of those last weeks after the tests making a mathematical mess with Challenge 08 -- I mean, you're probably going to recycle a bunch of those old handouts anyhow, right?

Or, maybe your students are looking for something more relaxed at the end of the year -- why not go back to counting on your fingers with Challenge 03?

We're celebrating out tenth challenge with a series of pandigital puzzlers! Challenge 10, Part 1 is now available here, and on our YouTube channel.

Speaking of YouTube, CollaboMath has recently been accepted into YouTube EDU, a free source of educational content from around the world. Thanks to all who nominated us!