# Category Archives: Elementary School Math

## Guest Post: 4 Awesome Kids’ Math Games

If you’re a math teacher and are looking for fun ways to motivate your class or lighten the atmosphere, here are some great kids’ math games to help you along. Needless to say, the kids are definitely going to love them! Fun Kids’ Math Games – Fun Classroom Ideas for Teachers 1. Simple Mental Math… Read More »

## Why PEMDAS is ‘morally’ wrong

Here’s a video that explains why you need to memorise PEMDAS (or BODMAS, BIDMAS, depending where you are in the world) order of operation and why you don’t need to. Minute Physics who made this video made a mistake in assuming that PEMDAS is taught in schools without emphasising that multiplication and division should be… Read More »

## Why do we ‘invert’ the divisor in division of fractions

The easiest (and the most common) way to teach division of fractions is to just give the rule: To divide 5/8 by 2/3, just multiply 5/8 by the reciprocal of the divisor, 2/3. That is, 5/8 ÷ 2/3 = 5/8 × 3/2 = 5×3/8×2 = 15/16. If this is all we want our students to learn why… Read More »

## A triangle is a fish

Why is it that students find it easier to calculate the area of triangle ABC but will have difficulty calculating the area of triangle DEF? Middle school students even believe that it’s impossible to find the area of DEF because the triangle has no base and height! That knowing the invariant properties that makes a… Read More »