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In this activity, learners make "totally tubular" forms of carbon. Learners use chicken wire to build macro models of carbon nanotubes.

In this activity, learners create a simple “top” from a CD, marble and bottle cap, and use it as a spinning platform for a variety of illusion-generating patterns.

In this activity, learners use squares to figure out how many border tiles are needed to enclose different areas.

In this sorting activity, learners play a game in which they try to identify the largest number of differences between two objects.

In this activity, learners use their feet to estimate distances. Learners calculate the distance of one step in centimeters by measuring 10 steps at a time to reduce measurement error.

In this activity, learners practice counting and multiplication as they figure out how many animal body parts they have to examine as "Dr. Vet."

In this activity, learners develop their understanding of combinations as they create as many different kinds of tostadas as possible.

In this activity, learners investigate whether more people are squares or rectangles. People with similarly sized heights and arm spans are classified as squares.

Create a “Find Someone” list, with about 10 items, each containing a shape, number, or measurement. Can you find someone in the group with hair about 4 inches long? Someone wearing parallel lines?

In this activity, learners explore scale by using building cubes to see how changing the length, width, and height of a three-dimensional object affects its surface area and its volume.

In this calculus activity, learners use a classic problem of geometrical probability to find an important mathematical constant (pi).

In this activity, which requires adult supervision, learners get to explore the awesome power of chemistry.

In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

In this online interactive, learners use fossils to infer temperatures 55 million years ago, at the sites where the fossils were found.

In this activity (located on page 10 of the PDF), learners explore the properties of spraying and dripping water, while making art.

En esta actividad, los aprendices leen sobre como Mateo y Cientina conducen una investigación forense para descubrir quien llevó unos dulces.

In this math activity, learners use cubes to calculate how many blocks it would take to build stairways with different heights.

In this demonstration, learners explore a variation of a Foucault pendulum, but upside down.

In this activity, learners follow clues to find five puzzle pieces, then assemble them. This activity works well with a whole group, individuals, or families.

In this activity, learners overlap the three primary colors to see how all other colors are made.