13 Rules that Expire

Looking to create critical thinkers in mathematics, but you’re not sure where to begin? Read this article, by Karen Karp, Sarah Bush, and Barbara Dougherty and published by the National Council of Teachers of Mathematics. Rules like, “You can’t take a bigger number from a smaller number, ” and “When you add and multiply you always get a larger number,” are examples of rules we hear teachers give in our classrooms that are simply not true. This is a great, quick read, and could offer an incredible opportunity for discussion among teachers in any building!