Science · Year 3

Active learning ideas

Light and Colour

Active learning builds lasting understanding in light and colour because hands-on experiments let students see abstract ideas in real time. When students manipulate prisms and filters themselves, they move from guessing about colours to observing how light splits and interacts with objects.

• National Curriculum Attainment Targets
• KS2: Science - Light

• 20–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Stations Rotation
• 45 min · Small Groups

Stations Rotation: Prism Rainbows

Prepare stations with prisms, torches, and white paper. Students shine light through prisms to project spectra, measure band widths, and note colour order. Rotate groups every 10 minutes, then discuss patterns as a class.

Explain why a rainbow appears after rain.

Facilitation Tip

During Prism Rainbows, circulate and ask each group to predict which colour will appear first in the spectrum before they shine the light.

What to look for

Provide students with a small prism and a torch. Ask them to draw what they observe when shining the light through the prism onto a white surface and label at least three colours they see in the spectrum.

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Activity 02

• Experiential Learning
• 30 min · Pairs

Pairs Investigation: Coloured Shadows

Provide torches, cellophane filters in red, blue, green, and white objects like toys. Pairs predict and test shadow colours on walls, record results in tables. Share findings to identify rules.

Differentiate between primary and secondary colours of light.

Facilitation Tip

During Coloured Shadows, remind pairs to record their predictions before testing, then compare results to their initial ideas.

What to look for

Show students a red object and ask: 'If I shine a blue light on this red object, what colour will it appear? Explain your answer.' Listen for explanations involving reflection and absorption of light wavelengths.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 03

• Experiential Learning
• 25 min · Whole Class

Whole Class: Filter Prediction Challenge

Display objects under a projector with coloured filters. Class predicts appearances before revealing, votes on answers, then tests with handheld torches. Chart predictions versus observations.

Predict what colour an object would appear under different coloured lights.

Facilitation Tip

During the Filter Prediction Challenge, provide one wrong prediction example to the class and ask students to explain why it’s incorrect using the filters they’ve tested.

What to look for

Pose the question: 'Why do we see a green leaf as green, but it looks black under a red light?' Facilitate a class discussion where students use terms like reflection and absorption to explain their reasoning.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 04

• Experiential Learning
• 20 min · Individual

Individual: Rainbow Journal

Students draw observed rainbows from prisms, label colours, and write explanations of raindrop roles. Include photos or sketches from outdoor hunts after rain.

Explain why a rainbow appears after rain.

Facilitation Tip

In Rainbow Journal, model how to label diagrams with terms like refraction and absorption before students begin their entries.

What to look for

Provide students with a small prism and a torch. Ask them to draw what they observe when shining the light through the prism onto a white surface and label at least three colours they see in the spectrum.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

A few notes on teaching this unit

Teach this topic through cycles of prediction, testing, and explanation to build scientific reasoning. Avoid giving answers too quickly; instead, guide students to notice patterns in their observations. Research shows that students grasp light behaviour best when they manipulate materials themselves and explain their findings to peers.

Successful learning looks like students confidently explaining why white light splits into colours, predicting how objects appear under different coloured lights, and using terms like reflection and absorption in their discussions. Their journals should show clear diagrams and accurate observations from each station.

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Watch Out for These Misconceptions

• During Prism Rainbows, watch for students who think the prism contains colours inside itself.

  Hand each group a torch and prism, then ask them to predict what colours they will see before shining the light. Encourage them to trace the light path and note that the colours emerge as sunlight splits, not from the prism itself.

• During Coloured Shadows, watch for students who believe shadows are always black.

  Provide coloured filters and objects, then ask students to predict shadow colours before testing. Guide them to observe that shadows take on the colour of the light blocked, not just black.

• During the Filter Prediction Challenge, watch for students who confuse light colour mixing with paint mixing.

  Give each pair two overlapping filters and ask them to predict the resulting colour. Have them test with a white surface to see that light colours add, unlike paint, which subtracts colours.

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Methods used in this brief

• Stations Rotation
• Experiential Learning