Activity 01
Stations Rotation: Shadow Sizes
Prepare four stations with torches: one for object-to-screen distance, one for light-to-object, one for light angle, and one for object shape. Small groups spend 8 minutes at each, drawing before-and-after shadow outlines and noting changes. End with a class share-out of patterns.
Explain the process by which a shadow is formed.
Facilitation TipDuring Shadow Sizes, position a ruler next to the screen so students can measure and record shadow lengths at each distance.
What to look forGive each student a small object and a torch. Ask them to create a shadow on a piece of paper. On the back of the paper, they should write: 1) One sentence explaining why the shadow formed. 2) One way to make the shadow bigger and one way to make it smaller.
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Activity 02
Shadow Puppets: Story Time
Students cut animal shapes from card for puppets. In dim light, pairs use torches to project shadows on a sheet and act out simple stories. Discuss how moving puppets alters shadow size and shape during performances.
Analyze the factors that cause a shadow to alter its shape or size.
Facilitation TipFor Shadow Puppets, dim the classroom lights so the torch beams are more visible and shadows stand out clearly.
What to look forDuring the activity, circulate with a checklist. Ask individual students: 'Point to your light source. Point to your object. Point to the shadow. Can you make the shadow change shape? How?' Note their responses and actions.
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Activity 03
Outdoor Prediction Hunt
On a sunny day, whole class uses meter sticks to mark object shadows every 15 minutes. Predict length changes as sun moves, then measure and graph results on chart paper. Compare predictions to data.
Predict how the position of a light source affects a shadow.
Facilitation TipBring clipboards and pencils for the Outdoor Prediction Hunt so students can quickly sketch shadows before moving to the next station.
What to look forGather students and ask: 'Imagine you are playing outside and the sun is high in the sky. Then, the sun starts to set. What happens to the shadows of trees and people? Explain why.'
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Activity 04
Matching Pairs: Object to Shadow
Print object images and their shadows at different distances. Pairs sort and match cards, explaining size clues. Extend by creating their own matches with real objects and torches.
Explain the process by which a shadow is formed.
What to look forGive each student a small object and a torch. Ask them to create a shadow on a piece of paper. On the back of the paper, they should write: 1) One sentence explaining why the shadow formed. 2) One way to make the shadow bigger and one way to make it smaller.
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Generate Complete Lesson→A few notes on teaching this unit
Start by asking students to predict how a shadow will change before they move the light or object. This builds anticipation and reveals misconceptions early. Avoid long explanations about light rays before hands-on time. Instead, let students explore first, then guide their observations with targeted questions. Research shows that children learn best when they manipulate materials and discuss findings in small groups.
Successful learning looks like students confidently explaining that shadows form when light is blocked, predicting how moving objects or light changes shadow size, and using terms like 'opaque' and 'light source' accurately. They should also demonstrate curiosity by asking questions about light behavior and shadows during activities.
Watch Out for These Misconceptions
During Station Rotation: Shadow Sizes, watch for students assuming shadows match object size exactly.
Have students measure and compare the toy’s height with its shadow length at different distances. Ask, 'How does the shadow compare when the toy is close to the screen? What do you notice about the edges?' Guide them to observe that shadows enlarge or shrink based on distance.
During Shadow Puppets: Story Time, watch for students believing shadows only appear in sunlight.
During the activity, pause to ask, 'What happens if we use the torch instead of sunlight?' Have students use their phone flashlights to create shadows, then explain that any light source works because light travels in straight lines.
During Outdoor Prediction Hunt, watch for students thinking light bends around objects to create fuzzy edges.
Provide torches with small holes to project sharp beams. Ask students to trace the edges of the shadows and compare them to the object’s outline. Discuss why sharp edges mean light does not bend around the object.
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