Printable Handouts
Try exploring numeracy when food shopping with preK-2nd graders.
Here are a variety of math puzzles
for grades 2-6.
Did you know that Fibonacci did not "discover" the numbers named after him? This handout has some explorations of Fibonacci or Pingala Numbers and is best for 1st-6th graders..
What is the "diameter" of a circle? What is its "circumference"? Are they related? In this activity for 1st-4th graders, students measure circles and see if a circle's diameter and circumference are related.
Learn how to use a compass and straight edge to do various activities related to circles. This may be best for grades 3 and up.
Try Buffon's Needle Problem by tossing a set of straight objects all the same size (like toothpicks or pine needles) at a set of lines to estimate pi! This is recommended for grades 6 through high school.
We go into ranked choice voting, plurality vs. simple majority, and the U.S. Electoral College in this handout about voting designed for grades 1-8 and beyond.
Algebra students learn about factoring which can seem to be a black art. We teach a variety of techniques to factor quadratics, including Polina's Method, named after one of our students. This handout is suitable for high school students and up, or for anybody who understands quadratics.
Videos
We have fun techniques to make it easy to understand converting fractions to decimals, including a nifty trick for sevenths. Check out this three-part series suitable for middle- and high- schoolers.
It is easy to find the number of factors of any positive integer once you do a prime factorization. This video, for 5th graders and up, shows you how.
It is straightforward to find the sum of the factors of any positive integer. A video for 6th graders and up is forthcoming.
Proof by induction is a powerful technique. In this forthcoming video for algebra students and up, we illustrate induction by proving that the sum of cubes equals the square of the sum.