Activity 01
Outdoor Tracking: Shadow Sticks
Place sticks vertically in the ground at schoolyard spots. Have students measure and record shadow lengths and directions every hour from morning to afternoon. Groups sketch paths on paper and compare results at class end.
Analyze why the Sun appears to move across the sky from east to west.
Facilitation TipDuring Outdoor Tracking: Shadow Sticks, remind students to mark the ground carefully so their measurements are consistent and comparable over time.
What to look forProvide students with a blank diagram of the sky. Ask them to draw the apparent path of the Sun from sunrise to sunset, labeling the East and West directions. Then, ask them to write one sentence explaining why the Sun appears to move.
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Activity 02
Craft Activity: Sundial Construction
Provide paper plates, straws, and markers. Students align straws north-south, mark hour positions based on shadow casts, and test outdoors. Discuss accuracy and time-telling uses in pairs.
Differentiate between the Earth's rotation and its orbit around the Sun.
Facilitation TipFor Craft Activity: Sundial Construction, demonstrate how to align the gnomon with true north using a compass or a reference point.
What to look forDuring outdoor observation, ask students to hold up their recording sheets and point to where the Sun is in the sky. Then, ask them to identify the direction their shadow is pointing and explain why. For example: 'Where is the Sun now? Which way is your shadow pointing? Why is it pointing that way?'
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Activity 03
Model Demo: Globe Rotation
Use a globe and lamp as Sun. Rotate globe slowly while students note shadow shifts on a taped figure. Record observations, then link to real sky paths in whole-class talk.
Construct a sundial to tell time using the Sun's position.
Facilitation TipIn Model Demo: Globe Rotation, turn the globe slowly so students connect the shadow changes they observed outside to the model’s rotation.
What to look forFacilitate a class discussion using the prompt: 'Imagine you are explaining to someone younger why the Sun seems to move across the sky. What are the two main ideas you would share, and how would you use your sundial to help them understand?'
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Activity 04
Data Graph: Path Plotting
Students plot class shadow data on large charts, connecting points to show arc. Compare morning and afternoon paths. Extend by predicting next-day shadows individually.
Analyze why the Sun appears to move across the sky from east to west.
Facilitation TipWhen completing Data Graph: Path Plotting, have students use different colors for each observation day to highlight seasonal changes.
What to look forProvide students with a blank diagram of the sky. Ask them to draw the apparent path of the Sun from sunrise to sunset, labeling the East and West directions. Then, ask them to write one sentence explaining why the Sun appears to move.
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Generate Complete Lesson→A few notes on teaching this unit
Experienced teachers approach this topic by starting with direct observation outdoors, which grounds the concept in students’ daily experience. Avoid explaining the Sun’s motion abstractly before students have data from their own measurements. Research shows that building the sundial after shadow tracking strengthens the connection between evidence and explanation, making the model more meaningful.
Successful learning looks like students accurately predicting shadow directions at different times, explaining why shadows change length and direction, and using their data to explain the Sun’s daily path. Groups should articulate the link between Earth’s rotation and the Sun’s motion clearly.
Watch Out for These Misconceptions
During Model Demo: Globe Rotation, watch for students believing the Sun moves around Earth daily.
Use the globe to slowly rotate it while students observe how the shadow stick’s shadow moves, then ask them to explain what is really moving and why the shadow shifts.
During Outdoor Tracking: Shadow Sticks, watch for students thinking shadows always point the same way.
Have students compare their shadow directions at 9am, noon, and 3pm, then ask them to explain why the direction changes using their recorded data.
During Data Graph: Path Plotting, watch for students assuming the Sun’s path is the same every day.
Guide students to compare their weekly graphs, pointing out differences in shadow length and path, then connect these changes to Earth’s orbit tilt during a class discussion.
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