Science · Year 5

Active learning ideas

Reflection and Mirrors

When learning about reflection and mirrors, active learning allows students to directly manipulate light and surfaces, making abstract concepts tangible. Hands-on investigations foster deeper understanding than passive observation, encouraging students to discover the principles of light behavior for themselves.

• ACARA Content Descriptions
• AC9S5U03

• 30–60 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Inquiry Circle
• 60 min · Small Groups

Periscope Design Challenge

Students work in small groups to design and build a simple periscope using cardboard boxes and mirrors. They test their periscopes to observe how light reflects twice to allow viewing over obstacles.

Analyze how the angle of incidence affects the angle of reflection.

Facilitation Tip

During the Periscope Design Challenge, encourage groups to iterate on their designs, reminding them that Problem-Based Learning often involves multiple attempts to solve a complex problem.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 02

• Inquiry Circle
• 45 min · Pairs

Law of Reflection Investigation

Using a light source (like a laser pointer or flashlight with a narrow beam), a mirror, and a protractor, students trace the path of light. They measure the angle of incidence and angle of reflection for various angles to verify the law of reflection.

Design an experiment to demonstrate the law of reflection.

Facilitation Tip

During the Law of Reflection Investigation, guide students to use the protractor precisely to measure angles, reinforcing the core mechanics of the Stations Rotation where focused work at each station is key.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 03

• Inquiry Circle
• 30 min · Small Groups

Mirror Surface Exploration

Students compare reflections in different materials: a mirror, a shiny metal spoon, a piece of aluminum foil, and a piece of paper. They record observations about the clarity and distortion of the reflections.

Explain how different types of mirrors produce different reflections.

Facilitation Tip

During the Mirror Surface Exploration, prompt students to ask 'why' the reflections differ, supporting the Inquiry Circle's focus on student-generated questions driving the investigation.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

A few notes on teaching this unit

Effective teaching of reflection and mirrors involves shifting from simply stating the law of reflection to enabling students to discover it. Use demonstrations to spark curiosity, but prioritize student-led experimentation to build genuine understanding of light's behavior.

Students will be able to accurately predict and demonstrate how light reflects off different surfaces. They will articulate the relationship between the angle of incidence and the angle of reflection, and explain how mirrors form images based on light ray behavior.

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Watch Out for These Misconceptions

• During the Law of Reflection Investigation, watch for students who assume the image is created by the mirror itself, rather than by light rays.

  Redirect students to use their flashlights and mirrors to trace the path of light, demonstrating that the image is formed by light rays bouncing off the mirror and entering their eyes, not by the mirror magically producing an image.

• During the Law of Reflection Investigation, students may believe the angle of incidence and reflection are always the same, regardless of the angle of light.

  Guide students to use protractors to measure and compare the angles of incidence and reflection at various points, allowing direct observation to reinforce that the angle of reflection equals the angle of incidence for smooth surfaces.

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Methods used in this brief

• Inquiry Circle