The Case for “Across”

The distributive property is a common theme throughout math learning. While it has long held precedence in algebra as the way to multiply expressions, it's now being taught in the early days of...

How to: Prime vs Composite Numbers

You may have a vague memory and understanding that numbers come in two forms: prime numbers and composite numbers. (Or at least prime and not prime.) Both of these terms have to do with a number's...