Students put all of their addition and subtraction skills together to solve equations.

School-aged children focus on addition and subtraction at first, and then eventually reach multiplication (in the form of skip counting) and division (in the form of equal shares).

"Motion Math: Hungry Fish" helps young students practice addition and subtraction. A fish swims around in the water, swallowing numbers that float in bubbles.

Ellis showed a subtraction problem, performed both using the traditional regrouping, or borrow-and-carry, algorithm and using an example from the common core. Here’s a screenshot of the two methods.

From classrooms to kitchen tables, debates about math education are never far away. Should teachers drill multiplication ...

New Study: You Probably Completely Ignore This Brilliant Problem-Solving Strategy The easiest way to solve tough problems is also the one we usually think of last.