Addition and Subtraction Tricks Without Pen and Paper: Doing quick calculations without writing anything down can seem tricky, but with the right mental math techniques, students can easily learn to ...

“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 ...

Represent teen numbers with addition and subtraction equations involving one 10. Represent 10 using a number bond and 10-frame with a missing addend. Use Notice and Wonder with a 10-frame, connecting ...

You can’t always use a calculator or a pen and paper to work out a sum. Sometimes you have to work it out in your head. Sometimes it’s even faster. There is only one rule when it comes to mental maths ...

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