SamizdatMath

This is the best investigation you can find anywhere which links exponential growth with paper folding. It includes background information about the investigation, and uses charts and tables to keep track of how tall a piece of paper would be if you folded it in half up to 60 times. The activity works with both customary and metric units and has answer keys for both. This investigation also looks at the formula that was derived by Britney Gallivan, a high school junior who actually proved that

Howdy you all! You know, one of the things I love about people who don't know much about math is that they think that there's always one right answer to a math question. Well, there isn't: the reality is that most math questions (even seemingly simple ones like "how much is 2 + 2?") have answers like "well, it depends." In the case of "how much is 2 + 2, it depends on the base system you're working in: if it was base 3, then the answer would be 11 (1 group of 3 and 1 remainder), or it it was bas

First of all, let’s get one thing out of the way: Archimedes never used the Greek letter “pi” when he used it to calculate the area and circumference of a circle. No, never; so just by reading this blurb you've learned something new! The point of this activity is threefold: the first is to show that as you double the diameter of a circle, the area of that circle would quadruple. That’s a very important concept, because many of your students have only experienced relationships where if