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Horton Senses Something Small
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In this story time program, young learners listen to the Dr.

Spots, Lines and Lasers
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Learners shine the light of a laser pointer through sheets of fabric that all have a different number of threads per inch.

How Thick is Your Hair?
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In this activity on page 13 of the PDF, learners use a laser pointer (with known wavelength of light) to measure the thickness of a human hair.

From the Internet to Outer Space
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In this activity, learners will use Google Sky to observe features of the night sky and share their observations.