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Category Archives: K12 Mathematics
A Tour of Robert Kaplinsky’s Online Resources
Robert Kaplinsky is a math educator and presenter. He also cofounded Open Middle, a website that encourages problems which require “a higher Depth of Knowledge than most problems that assess procedural and conceptual understanding,” according to the Open Middle website. These “open middle … Continue reading
Posted in K12 Mathematics, Math Education, people in math, Recreational Mathematics
Tagged mTBos, ObserveMe, Open Middle, Robert Kaplinsky
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Math with Martin
Most teachers and students in the U.S. didn’t have math class today because of the Martin Luther King, Jr. Day holiday. But when you get back to the classroom, the online math world has some suggestions of how to incorporate … Continue reading
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
Posted in K12 Mathematics, Math Education
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BacktoSchool 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 backoftheenvelope calculations, if everyone in the country went to the path of totality, … Continue reading
Which One Doesn’t Belong?
1, 2, 4,…. What’s the next number in the sequence? I was a rulefollower 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
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
Posted in K12 Mathematics, Math Education
Tagged algebra, Andrew Hacker, Ben Orlin, Keith Devlin, Simon Jenkins
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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 warmup math puzzle or game. I know plenty … Continue reading
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
Posted in K12 Mathematics, Math Education
Tagged combinatorics, education, fun problems, nerdsniping, thinking in math class
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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
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 →