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This lesson focuses on how materials behave differently as their surface area increases.

In this classic hands-on activity, learners estimate the length of a molecule by floating a fatty acid (oleic acid) on water.

This lesson focuses on how nanotechnology has impacted our society and how engineers have learned to explore the world at the nanoscale.

In this activity, young learners use different-sized paper 'caterpillars' and various household items to predict and measure their height.

This lesson focuses on surface area and how the shape of sugar crystals may differ as they are grown from sugars of different coarseness.

In this activity, learners "go fishing," then practice ruler use and size/pattern comparison with the animals they catch.

In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.

In this activity, learners make their own pinhole viewer in order to measure the size of the sun.