Principles of the Physical World: Senior Cycle Physics · 5th Year

Active learning ideas

Magnetic Fields and Permanent Magnets

Active learning works for this topic because students need to see magnetic fields with their own eyes to move beyond abstract ideas. When students handle magnets and iron filings, they build mental models that static images cannot provide. This hands-on work makes invisible forces visible and memorable.

• NCCA Curriculum Specifications
• NCCA: Senior Cycle - Magnetism

• 15–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Stations Rotation
• 45 min · Small Groups

Stations Rotation: Magnet Field Stations

Prepare four stations: one with bar magnets and iron filings, one with horseshoe magnets, one for compass tracing around magnets, and one for pole interaction predictions. Groups rotate every 10 minutes, sketching field lines and noting observations. Conclude with a class share-out of comparisons.

Explain how a compass works using the Earth's magnetic field.

Facilitation Tip

During the Magnet Field Stations activity, remind students to use only small amounts of iron filings to avoid cluttered patterns that obscure field lines.

What to look for

Provide students with diagrams showing two magnets with labeled poles facing each other. Ask them to draw arrows indicating the direction of force (attraction or repulsion) and write one sentence explaining their prediction.

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

Activity 02

• Experiential Learning
• 25 min · Pairs

Pairs Prediction: Pole Interactions

Pairs label north and south poles on two bar magnets, predict attraction or repulsion for all combinations on a worksheet, then test with real magnets. They record results and explain using like-unlike pole rules. Extend by trying with multiple magnets.

Compare the magnetic field lines around a bar magnet to those around a horseshoe magnet.

Facilitation Tip

For the Pole Interactions activity, provide labeled magnets and ask pairs to test all combinations before sharing results, ensuring they see the complete pattern.

What to look for

Hold up a bar magnet and a compass. Ask students to observe the compass needle's movement. Then, ask: 'What does this observation tell us about the Earth's magnetic field and how a compass works?'

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

Activity 03

• Experiential Learning
• 30 min · Whole Class

Whole Class: Compass Earth Field Walk

Distribute compasses; students walk school grounds noting needle directions relative to geographic north. Mark magnetic north on a large map. Discuss how Earth's field causes alignment and link to permanent magnet fields.

Predict the interaction between two permanent magnets based on their poles.

Facilitation Tip

During the Compass Earth Field Walk, bring a map and have students mark their starting point to compare compass direction with true north.

What to look for

Present students with a scenario: 'Imagine you have two bar magnets, and you want to create a field strong enough to levitate a small iron object. How would you orient the magnets and what properties would the magnets need?' Facilitate a class discussion on their proposed solutions.

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

Activity 04

• Experiential Learning
• 15 min · Individual

Individual: Field Line Sketches

Provide images of iron filings around magnets; students sketch field lines, label poles, and compare bar to horseshoe patterns. Follow with self-check against model diagrams.

Explain how a compass works using the Earth's magnetic field.

Facilitation Tip

After Field Line Sketches, ask students to label regions of high and low field density and explain how this relates to force strength.

What to look for

Provide students with diagrams showing two magnets with labeled poles facing each other. Ask them to draw arrows indicating the direction of force (attraction or repulsion) and write one sentence explaining their prediction.

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

A few notes on teaching this unit

Teaching this topic works best when students experience the phenomena first and then formalize their observations with vocabulary and rules. Avoid starting with definitions; instead, let students observe patterns and then introduce terms like 'field lines' and 'poles' to match what they see. Research shows that tactile experiences with magnets lead to stronger conceptual understanding than lectures alone.

Successful learning looks like students confidently predicting and explaining magnetic interactions using evidence from their investigations. They should describe how field line density and compass directions relate to force strength and direction. By the end, students should use correct terminology and apply rules to new scenarios.

---

Watch Out for These Misconceptions

• During the Pole Interactions activity, watch for students who assume a single pole exists or ignore the second pole when predicting force directions.

  Ask students to test all four combinations of poles (N-N, N-S, S-N, S-S) and record their observations in a table to see the consistent pattern of like-repel and unlike-attract.

• During the Magnet Field Stations activity, watch for students who describe field lines as physical ropes or wires.

  Have students trace field lines with a compass and note that the needle moves smoothly along curves, not along rigid paths; ask them to sketch what they observe to reinforce the idea of continuous curves.

• During the Compass Earth Field Walk activity, watch for students who believe a compass points exactly to the geographic North Pole.

  Provide maps with magnetic declination marked and ask students to measure the difference between their compass reading and true north; have them average group measurements to demonstrate variability.

---

Methods used in this brief

• Stations Rotation
• Experiential Learning