“For some, common core is creating common confusion,” said education correspondent Rehema Ellis on a recent NBC News segment. The crux of the news piece was that parents are struggling to help their ...

Students go over addition and subtraction with regrouping using different strategies. In this lesson, students go over addition and subtraction with regrouping using different strategies to solve.

The Common Core State Standards suggest several strategies for teaching early addition and subtraction, including one called “making ten.” That strategy—which I used as a teacher myself years ago, ...