Category Archives: K-12 Mathematics

Michael Pershan’s Problem Problems

I have enjoyed math teacher Michael Pershan’s work for a long time. I follow him on Twitter, and I wrote about his website Math Mistakes a few years ago because, darn it, mistakes are interesting! A couple years ago, he … Continue reading

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Back-to-School Blogs, 2017 Edition

Today, I’m taking my chances with traffic and driving up to Idaho to try to get in the path of eclipse totality. (Fun fact: according to my back-of-the-envelope calculations, if everyone in the country went to the path of totality, … Continue reading

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The Pseudocontext 2016 Deserves

2016 has been the year of the lolsob. I have my reasons for feeling that way, and I’m guessing you might too. In that light, I’ve especially started looking forward to Dan Meyer’s “pseudocontext Saturday” posts. In each one, he finds a picture … Continue reading

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Which One Doesn’t Belong?

1, 2, 4,…. What’s the next number in the sequence? I was a rule-follower as a kid, so I always got the “right” answer on questions like that, but they still bugged me. Sure, 8 would be predictable, but why … Continue reading

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Algebra: It’s More Than Just Parabolas

Our old pal Andrew Hacker is back at it again. With the publication of his new book and a spate of recent media appearances, he is a man on a mission. A professor emeritus in the Department of Political Science … Continue reading

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Getting Warmer…

I’m currently teaching a summer school for high school students. Our main focus is number theory and its applications to cryptology, but I like to start each morning with some kind of warm-up math puzzle or game. I know plenty … Continue reading

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Prepare to Be Nerdsniped

You have a lot of bags, and you want to store them by stuffing all of them into one of the bags. For n bags, how many ways are there to do this? I’ve spent a good amount of time … Continue reading

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Alias, Schmalias

While the great line from Romeo and Juliet: “a rose by any other name would smell as sweet” rings true, would a digital rose smell as sweet?  We often think of the digital world as a mere “renaming” of the … Continue reading

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Awesome K-12 Math Teachers Exist! And they have blogs.

I sometimes get tired of hearing about how “teachers (meaning K-12 teachers) just don’t understand this or that, or won’t try doing something new,” or are deficient in some way or another.  We often advise teachers to let go of … Continue reading

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My Top Ten Issues in Mathematics Education

What are your “top ten”?  Sue VanHattum, a full time faculty member at Contra Costa College inspired me with her wonderful top ten list . Below are my top ten Issues in Mathematics Education.  While this is my opinion, I do … Continue reading

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