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Ep. 26: Sprouts Math Game

This is a really neat game invented in 1967 by two mathematicians that was soon after published in Scientific American, where it caught fire with people all over the world. It’s a very simple game with a lot of interesting …Read More

Ep. 25: Lasers, Jell-O, and Trigonometry

If you’re scratching your head during math class, wondering what you’ll ever use this stuff for, here’s a cool experiment that shows you how scientists use math to figure out the optical density of objects, called the “index of refraction”. …Read More

Ep.24: Finger Multiplication

Having trouble with your 6, 7, 8, and 9 multiplication tables? Sneak a peek at this nifty trick for multiplying single digits together. All you need is a set of hands and about ten minutes, and you’ll be a whiz …Read More

Ep.23: Drawing Machine

We’re going to make a quick and easy drawing machine that will teach your kids about the conservation of energy! By storing energy in the rubber band (called “elastic potential energy”), you can see for yourself how this transforms into …Read More

Ep.22: Cryptarithms

Cryptarithms are a puzzle where the digits are replaced by letters or symbols. When the numbers are replaced by letters of the alphabet and it spells something readable, it’s called Alphametics. Download the student worksheet that goes with this lesson. …Read More

Ep.21: Clothespin Catapult

Ancient people teach us a thing or two about energy when they laid siege to an enemy town. Although we won’t do this today, we will explore some of the important physics concepts about energy that they have to teach …Read More

Ep.20: Binary Counting

One day, my kid asked me how a calculator comes up with its answers. That’s a great question, I thought. How does a calculator do math? After thinking about it, I realized this was a great way to teach him …Read More

Ep.19: Building Bridges

What keeps building from toppling over in the wind? Why are some earthquake-proof and others not? We’re going to look at how engineers design buildings and bridges while making our own. Can you build a bridge using only popsicle sticks …Read More

Ep.18: Secret Codes & Ciphers

Cryptography is the writing and decoding of secret messages, called ciphers. Now for governments these secret ciphers are a matter of national security. They hire special cryptanalysts who work on these ciphers using cryptanalysis. The secret is, solving substitution ciphers …Read More

Ep. 17: Electromagnetic Crane

Most of the electricity you use comes from moving magnets around coils of wire. Electrical power plants either spin HUGE coils of wire around very powerful magnets or they spin very powerful magnets around HUGE coils of wire. The electricity …Read More