Activity 01
Pair Testing: Pole Interactions
Pairs receive bar magnets marked north-south. They bring poles together, record if they attract or repel, and test combinations like north-north. Discuss patterns and share findings with the class.
Explain how the poles of a magnet interact with each other.
Facilitation TipDuring Pair Testing, encourage students to flip one magnet at a time to isolate how pole orientation changes the outcome.
What to look forProvide students with two bar magnets. Ask them to draw the magnets in two positions: one showing attraction and one showing repulsion. For each drawing, they should label the poles and write one sentence explaining the interaction.
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Activity 02
Small Groups: Iron Filings Fields
Groups place a bar magnet under white paper, sprinkle iron filings, and gently tap. They draw the field pattern, label poles, and compare with a partner. Repeat with magnet shapes for variations.
Analyze the pattern of a magnetic field around a bar magnet.
Facilitation TipWhen groups use iron filings, remind them to tap the paper gently to avoid scattering filings off the page.
What to look forDisplay an image of iron filings around a bar magnet. Ask students to identify the North and South poles based on the field line patterns. Ask: 'What do the curved lines represent and why do they go from pole to pole?'
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Activity 03
Design Challenge: Magnetic Game
Small groups plan a game using attraction and repulsion, like magnetic fishing or maze navigation. Build with magnets, paper clips, and cardboard, then test and refine rules for fair play.
Design a simple game that uses magnetic attraction and repulsion.
Facilitation TipFor the Magnetic Game, circulate and ask questions like 'Which poles are you using to attract or repel?' to guide design decisions.
What to look forPose the question: 'Imagine you are designing a game where players have to move a metal object across a board without touching it. How could you use magnets to make this game work?' Facilitate a brief class discussion, encouraging students to share ideas about attraction and repulsion.
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Activity 04
Whole Class: Compass Field Lines
Pass compasses around as students trace field lines around a central magnet. Mark north-seeking directions, connect lines, and discuss how compasses reveal field direction without filings.
Explain how the poles of a magnet interact with each other.
Facilitation TipDuring the Compass Field Lines activity, have students move slowly to observe how the compass needle shifts direction around the magnet.
What to look forProvide students with two bar magnets. Ask them to draw the magnets in two positions: one showing attraction and one showing repulsion. For each drawing, they should label the poles and write one sentence explaining the interaction.
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Generate Complete Lesson→A few notes on teaching this unit
Start with guided exploration so students notice patterns before formal definitions appear. Avoid telling them the rules upfront; let the evidence from their tests shape the conclusions. Research shows this approach builds stronger conceptual understanding than lectures followed by labs. Always connect the concrete experience of the iron filings to the abstract idea of a field by having students trace and name the lines.
Students will confidently predict and explain how magnets attract or repel, trace magnetic field lines with filings, and apply these ideas to design a simple magnetic game. Evidence of learning includes labeled sketches, accurate predictions, and thoughtful design choices.
Watch Out for These Misconceptions
During Pair Testing, watch for students who assume all metal objects stick to magnets.
Provide a set of small objects (e.g., iron nail, copper wire, aluminum foil, steel paperclip) and have students test each in pairs, recording which materials respond. Guide them to classify materials as magnetic or not based on evidence.
During Iron Filings Fields, watch for students who think magnetic force is strongest only at the poles.
Ask students to compare the density of filings at the poles versus the middle of the magnet. Have them sketch the pattern and label where the lines are closest together, linking density to field strength.
During Pair Testing, watch for students who believe magnets lose strength when dropped.
Provide identical bar magnets and have groups drop one magnet from a set height onto a hard surface, then test its strength against the undropped magnet using the same object. Discuss observations as a class before students draw conclusions.
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