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MathFour

Math is not a Four Letter Word

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MathFour is Back!

For a while, a long while, I let this math blog just sit. I didn t want to delete it. I spent too much time on it and I knew it was full of great stuff that was still being used. But I wasn t in love with writing on it. In my lethargy, the hackers and [ ]

Seeing Math at Church

Can you see math at your church? I bet you can!

Fahrenheit to Celsius – Graphically!

The conversion from Celsius to Fahrenheit and back again can be strange. One way to understand it is on a graph. And you can use this to teach some linear algebra too!

Area of a Circle vs. Area of a Triangle

This is a neat way to look at how a circle can relate to a triangle — it's less of a proof and more of an inspiration to think.

Does Santa Exist — Mathematically?

Can you prove Santa exists? If not Mathematically, then at least you can catch him in the act with a fun photo service!

Personalized Number Puzzle Gift

Remember those email number puzzles that you get every now and then? Now's your chance to make your own — easily!

Area of a Right Triangle

Calculating the area of a right triangle includes remembering the formula, and doing the arithmetic correctly. Here's a short video demonstrating it.

Christmas on a Budget of $0

This year, money’s tight. But we’ve had tight Christmases before. Here's how I'm doing it on a $0 budget!

Great Gift Wrap Up — Math Gifts

Looking for some great gifts? Here's a big collection of educational math gifts that are fun!

Salvation Army Donation Math

Do you donate to charities? Here's how you can integrate a math lesson into it!