*[Photo by One Laptop Per Child.]*

Once again, I am adding to my Free (Mostly) Math Resources page. Here are a handful of helpful websites for teaching math…

## Master the Basics

**Professor Pig’s Magic Math**

Cartoons, hands-on games, and mental math practice — these pdf lessons are excellent to help students understand number bonds, rather than just memorizing math facts. (Only the first two lessons are available now; more coming soon.) See also: Math Games to Download.

## Word Problems Step by Step

**The Singapore Maths Teacher**

These slide shows demonstrate Singapore-style math models (also known as bar diagrams) step by step, beginning with relatively easy grade 3 word problems and working through to grade 6 stumpers. Excellent for elementary teachers who need to learn how to teach this method. See also: Problem Solving Strategies.

## No, It Isn’t Infinity

**Why We Don’t Divide By Zero**

Professor Homunculus of The Math Mojo Chronicles explains the mathematics of dividing by zero.

## I Love These Logic Problems

**Logic-Grid Brain Teasers**

I love logic grid problems, and Braingle offers *34 pages of them*. Have fun! See also: Math Brain Teasers.

## Challenge Yourself with Math and Logic Classics

**Problem Solving Island**

“The inhabitants of the island are a little different from you or me. Rather than pursuing standard enjoyments, like television, aerobics, and web surfing, they spend most of their time posing and solving puzzles…”

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Pingback:Thing 7b | Broyles BlogPingback:Carnival of EducationHi we try to collect math videos from around the web and for all level. We have collected videos from youtube, teachertube, howcast,etc and we also collected math video lecture from several math departments such as MIT, Berkeley, etc.

The site is http://www.watchmath.com.

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There are some interesting math games on this site -> http://www.zoobaisland.com/education

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