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...

# Tag: 4thgrade

Shortly after we start multiplying, we're taught to factor numbers. So often it feels like a pointless rite of passage that we're forced to endure. We learn it devoid of all the contexts it will be...

The area model's true strength is in multiplication. However, division bears a close enough relationship (they are inverse operations) to multiplication that we can use the area model to divide as...

The area model is a tool for organizing multiplication and division problems. The area model helps to ensure that each place value of one factor (one of the numbers being multiplied) is appropriately...

The area model is a powerful visual tool for organizing multi-digit multiplication. It is build on the premise that the area of a rectangle is the length of the rectangle times the width. Thus, when...

Just like no two humans are alike, different students struggle at different points along the path. However, if google searchers are to be believed, fourth grade seems to be a common sticking point...