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Every mathematician has a story that goes something like this. You’re at a party, and someone asks what you do for a living. “I’m a mathematician,” you say. “You must be a genius!” they reply. Or ...

Hannah Moulton teaches Algebra 1. But before her 9th graders get started on graphing linear functions or solving quadratic equations, she makes sure that they have a much more basic skill down pat.

When I was a new teacher, I wanted my students to see math not just as numbers and equations but as a tool to understand the world around them. My goal wasn’t for them to simply memorize formulas to ...