The final Books and Big Ideas of the 2025-2026 school year has taken place, and the story so carefully chosen by our incredible Lower School librarian was The Magical Yet by Angela DiTerlizzi. A math educator could not have wished…
If you’ve read the previous post on the fundamentals of counting, then subitizing is not news to you. If you haven’t yet, here is a link to that post! Tenzi is one of my favorite at-home-fun-for-everyone games that has a…
You’re dropping one kid at a birthday party in midtown and you’ve got the other kid in tow. Heading home is an option, though the moment you arrive home it will be time to reverse course and head back to…
Dice and dominoes are probably some of the first quantities we consciously subitize and assign a numerical value to as children. (Subitizing, you say? What’s that? Check out this post on the many nuances of counting.) The “pip” or dot…
This post features ideas and text from student guest editor E.B. from Class III. Maryan Mirzakhani is one of the mathematicians we learn about as we explore the habits of mind of mathematicians who have accomplished amazing things. We often…
This is what I asked my second graders when reviewing their homework assignment, which included a question asking them to choose one of three basic addition facts and one of three basic subtraction facts that they found interesting or perhaps…
Andrew WIles was a puzzle-loving ten year old when he came across Fermat’s Last Theorem in a book in his local library. He was ten when he decided that he would be the one to discover the proof that Fermat…
Math colored glasses are really just a way of describing a curious, noticing mindset. When you put them on while you are out and about, you start to see the world a little differently. You notice patterns in the tiles…