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Pinhole Magnifier
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In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object.
Alike and Different
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This activity (on pages 7-13) has pairs of learners survey an array of similarities and differences between them.
Pupil to Pupil
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In this quick and simple activity about reflexes (at the top of the webpage), learners conduct a simple test to explore pupillary response.