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

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

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

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.

In this activity, learners build a simple pinhole viewer. They use this apparatus to project images from a variety of light sources, including a candle, the Sun, and the Moon.

Get all wrapped up in a lesson about skin!

In this activity, learners use a straight line to learn about circles. Learners measure and record the diameter and circumference of different sized cylindrical objects on a chart.

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

In this activity, learners will explore how the human brain interprets environmental stimuli.

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

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

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