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Do Your Own Dig
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In this outdoor archaeology activity, learners use mathematical skills and scientific inquiry to generate and process information from their own excavation site.

Cylindrical Mirror
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In this activity, learners create a cylindrical mirror to see themselves as others see them.

Super Sounding Drum
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In this activity, learners construct drums out of everyday containers (like bowls or food containers) and shrink wrap. Learners use a hair dryer to affix and tighten the shrink wrap to the container.

Step Into Cyberspace
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In this activity, learners discover that they can modify a regular piece of paper so that it's large enough for them to walk through!

Patterns and Relationships: Peddling Petals
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In this math lesson, learners use the setting of a flower-making fundraiser to explore a variety of patterns. Learners examine the patterns in a flower design made of triangles surrounding a square.

Geometry: Let's Face It
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In this math lesson, learners identify, describe, and construct the five regular polyhedra.

Make a Tikiville Teepee
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In this great hands-on activity, learners use patterns to make a teepee from newspaper that they sit inside.

What Shape Is It?
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In this activity, learners determine the shape of an unseen object by bouncing a ball off the object.

Cup Sailing Game
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In this online Flash game, learners will captain a sailing challenge, adjusting boat direction and sails, seeking the way to take greatest advantage of varying wind speeds and directions to catch the

Construction and Destruction
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In this three/four-day lesson, learners calculate perimeters and areas and draw the castle plan to scale.

Beyond Dominoes: Polyominoes
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In this activity, learners add squares to paper dominoes to make polyominoes.

How to Learn Basic Shapes by Making a Shape Mobile
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In this activity, caregivers and young learners work together to craft and talk about shapes and relative positions of such shapes by creating a mobile.
Polarized Light
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In this optics activity, learners experiment with polarizers (small dark rectangles) to examine light intensity.

Pyramids and Triangles
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Straws and pipe cleaners are terrific materials for building models of pyramids and cubes.

Animal House
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The goal of this activity is to design, build and test a house or toy for an animal.

Crank It Up
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In this engineering activity, learners explore simple machines and then build cardboard automata using cams.

Exploring a Complex Space-Filling Shape
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In this activity, learners build a paper stellated rhombic dodecahedron, a three-dimensional 12-pointed star.

Look Into Infinity
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Learners use two mirrors to explore how images of images of images can repeat forever.

Castle Basics
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In this four-day lesson, learners identify three-dimensional forms in castle design, research different parts of the castle with a focus on their uses, and design and enlarge a banner for the great ha

Ambiguous Cube
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In this activity, learners construct a three-dimensional ambiguous cube to explore visual illusions and how our brains interpret or misinterpret information.