Here is a part-whole model. Sometimes the model is rotated. It looks different, but it still has two parts and a whole. We can use this model to help us solve problems. We can put 4 things in one of ...

Subtraction is taking away one number from another. When you subtract it gives you the difference between two numbers. Here are 7 blocks. If you take away three blocks, how many are left? There would ...

Help Super Grover 2.0 solve a prickly problem, read ALL THE WAYS TO BE SMART. Help Super Grover 2.0 solve a prickly problem, read ALL THE WAYS TO BE SMART, subtract using 10 frames, learn about short ...

Years ago, when her eighth-graders struggled with basic subtraction, teacher Rita Frenzel tried something different: She taught them chess. The math scores climbed, and so did a passion that would ...