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In this activity, learners explore a surprising method for calculating the mathematical constant pi, known as Buffon's Needle.

In this activity, learners use a string and pair of scissors to find pi in the world all around them. Take the circumference of a round object with string and cut the string to that length.

Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.

Wheels aren't the only things that can "roll" objects that are placed on top of it. Make non-intuitive shapes from cutouts and a compass to demonstrate this.

In this math activity, learners find patterns in telephone numbers.

In this game, learners strategize to be the first player to make three in a row.

This math challenge, played with two players or a whole group, engages your problem solving skills.

In this activity, learners play a guessing game to explore classification.

In this math activity, learners create symmetrical designs for paper models of special blouses known as huipiles.

In this activity, learners find as many combinations of a hundred as they can using various puzzle pieces from a hundred square grid paper.

In this math activity, learners make and explore patterns using the letters in their names, a grid, and some colors.

Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen.