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In this activity, learners will explore how and why weight distribution works.

In this activity, learners will explore pi and the mathematical relationships between a circle's diameter, circumference, and radius.

In this activity, learners explore center of gravity, or balance point, of stacked blocks.

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

In this mathematics activity (page 4 of the PDF), learners will explore the relationship between the diameter and circumference of an object.

In this activity, learners make their own encrypted code to pass along secret messages using a printable cipher wheel.

In this activity, learners will explore how product barcodes are scanned accurately and be able to "guess" the last number in a 13 digit barcode correctly every time.

This trick from Exploratorium physicist Paul Doherty lets you add together the bounces of two balls and send one ball flying.

In this math lesson, learners explore the real world meaning of slope. Learners conduct a balloon experiment in which they measure the circumference and flight time of deflating balloons.

In this math lesson, learners apply the concepts of ratios and percentages to the distribution of letters contained in a box of Alphabits® cereal.

In this activity, learners build a scale model of the solar system using a roll of toilet paper.

In this space science activity, learners explore transits and the conditions when a transit may be seen.

In this math lesson, learners determine and compare the rate of descent of various learner-constructed parachutes. Learners construct parachutes that will have maximum hang times.