Mental maths is when you do calculations in your head instead of writing them down. Sometimes, it's just as quick to do calculations in your head as it is to write down every step. You can add and ...

“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 ...

Fact families are groups of numbers that have a relationship to each other. For each pair of addition facts, there are also two subtraction facts in the same family. Here is a fact family using the ...