Science · Grade 3

Active learning ideas

Magnetic Fields and Everyday Uses

Active learning works well for magnetism because the invisible forces become visible through hands-on experiments. Students connect abstract concepts to concrete shapes and movements, making the topic memorable and engaging for young learners.

• Ontario Curriculum Expectations
• 3-PS2-3

• 25–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Stations Rotation
• 45 min · Small Groups

Stations Rotation: Field Patterns

Prepare stations with bar magnets, iron filings, white paper, and paper clips. Students sprinkle filings over magnets, tap to form patterns, then test attracting paper clips. Groups rotate every 10 minutes and sketch observations in journals.

Analyze how magnetic fields influence the movement of objects.

Facilitation Tip

During Station Rotation: Field Patterns, remind students to tap the paper gently so iron filings form clear curved lines without spilling.

What to look for

Students receive a card with a picture of a common object (e.g., refrigerator door, speaker, compass). They write one sentence explaining how a magnet is used in that object and one word describing the force involved (attract or repel).

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

Activity 02

• Experiential Learning
• 30 min · Pairs

Compass Deflection Pairs

Provide compasses and strong magnets per pair. Students observe compass needles pointing north, then bring magnets near to see deflection. Outdoors, they map how Earth's field interacts with schoolyard features and record angles.

Explain how a compass uses Earth's magnetic field to show direction.

Facilitation Tip

For Compass Deflection Pairs, have students place their compasses on a flat surface away from other magnets to avoid interference.

What to look for

Present students with a collection of small objects (e.g., paper clip, coin, eraser, iron nail, plastic toy). Ask them to test each object with a magnet and sort them into two labeled columns on their paper: 'Magnetic' and 'Non-Magnetic'.

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

Activity 03

• Experiential Learning
• 25 min · Pairs

Classroom Magnet Hunt

Distribute checklists of potential magnet uses like door latches or speakers. Pairs test items with a magnet, classify attractions, and share findings in a whole-class tally chart.

Evaluate the importance of magnets in various technologies we use.

Facilitation Tip

In the Classroom Magnet Hunt, provide small, safe magnets for students to test objects but remind them not to force interactions if magnets snap together too quickly.

What to look for

Ask students: 'Imagine you have two bar magnets. How could you arrange them to make them push away from each other? How could you arrange them to make them pull together? Explain your reasoning using the terms 'pole', 'attract', and 'repel'.

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

Activity 04

• Experiential Learning
• 35 min · Pairs

Simple Electromagnet Build

Supply nails, insulated wire, batteries. Pairs wrap wire around nails, connect to batteries, and test picking up paper clips. Discuss how current creates temporary fields.

Analyze how magnetic fields influence the movement of objects.

Facilitation Tip

When students build Simple Electromagnets, ensure they wrap wire tightly in one direction to create a stronger magnetic field.

What to look for

Students receive a card with a picture of a common object (e.g., refrigerator door, speaker, compass). They write one sentence explaining how a magnet is used in that object and one word describing the force involved (attract or repel).

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

A few notes on teaching this unit

Approach this topic by letting students observe firsthand before introducing terms. Avoid explaining concepts too early; instead, guide them to describe what they see using their own words. Research shows that concrete experiences build stronger mental models than abstract definitions alone. Encourage students to ask questions and test their ideas throughout the activities.

Successful learning looks like students describing magnetic patterns with accurate vocabulary, testing and sorting materials correctly, and explaining how forces influence objects in everyday contexts. They should confidently use terms like attract, repel, pole, and field during discussions and activities.

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Watch Out for These Misconceptions

• During Station Rotation: Field Patterns, watch for students assuming all metals respond to magnets the same way.

  Have students test a variety of classroom metals during the rotation and sort them into 'Magnetic' and 'Non-Magnetic' groups. Ask them to share observations with the class to build evidence-based distinctions.

• During Station Rotation: Field Patterns, watch for students thinking magnetic fields are only between the poles.

  Encourage students to trace the full loop of iron filings from one pole to the other and back. Ask them to compare their drawings to identify the complete field shape, then discuss how this changes their understanding of magnetic influence.

• During Compass Deflection Pairs, watch for students believing compass needles point directly to the geographic North Pole.

  Have students test compass deflection outdoors with nearby magnets and record needle movements. Use this data to explain that compasses align with Earth's magnetic field toward magnetic north, which is not the same as the geographic pole.

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Methods used in this brief

• Stations Rotation
• Experiential Learning