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ScienceEnergyAges 8–9

How switches work

Recognise that a switch opens and closes a circuit, controlling whether a lamp lights or a buzzer sounds

Lesson

Set out your lesson

Explain how a break or connection controls a simple series circuit.

Before teaching

Activity

Can discuss the supplied example in an accessible mode; adapt directions without supplying the target answer.

Policy

Check the learner can follow the model with support before moving on. Source prerequisite ordering is not learner mastery; return to prerequisite work when needed.

Printer, credit, and teaching notes

Work from the supplied circuit models. Physical extension only with an adult-supervised low-voltage educational kit already available, used exactly as its instructions specify. Never open household switches, use mains electricity, or connect battery terminals directly. Open S first, G together, then T alone; put S and G away before T. Keys stay adult-only. No purchase or printing is required; an unavailable physical observation remains pending, not passed.

Materials are ready in each step. Use them on screen or print just the current step. Put teaching examples aside before the learner tries.

Next: Show

Adult extras
What this lesson covers and its limits

These are bounded opportunities, not learner attainment. Partial and blocked source requirements remain so.

  • partial: Recognise that a switch opens and closes a circuit, controlling whether a lamp lights or a buzzer sounds

    Physical switch addition/demonstration is conditional; household wiring is not modelled as safe learner work.

  • partial: Explain that a closed switch completes the circuit (current flows) and an open switch breaks it (current stops)

    Physical switch addition/demonstration is conditional; household wiring is not modelled as safe learner work.

  • partial: Demonstrate adding a switch to a circuit and using it to control a bulb or buzzer

    Physical switch addition/demonstration is conditional; household wiring is not modelled as safe learner work.

  • partial: Relate the switch concept to everyday switches in the home

    Physical switch addition/demonstration is conditional; household wiring is not modelled as safe learner work.

  • partial: Can {{name}} explain what happens inside the wall when they flip a light switch — that it completes or breaks the electrical loop?

    Physical switch addition/demonstration is conditional; household wiring is not modelled as safe learner work.

  • Physical switch addition/demonstration is conditional; household wiring is not modelled as safe learner work.

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Family records and proof options

Keep a record of your learning

Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.

View learner plans ($12/mo per learner) See sample family archive

Learning resources

Extra practice links — they do not replace Gakuva’s teaching approach.

PhET Interactive Simulations · Practice link — not the full lesson

Circuit Construction Kit: DC

Open practice (new tab)
Before you open · source notes

Circuit Construction Kit: DC supports hands-on exploration for How switches work. Not every lab worksheet.

Free interactive page, no sign-in required for the tested path.

Before you open

Ask the learner what they changed in the sim or page and what they observed.

Opening this link does not save learning or assess mastery.

Source, access and review notes

Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.

PhET Interactive Simulations. “Circuit Construction Kit: DC.” External page; Gakuva does not copy, host, embed, or redistribute materials.

Unknown — link only

Check understanding

  • Explain that a closed switch completes the circuit (current flows) and an open switch breaks it (current stops)
  • Demonstrate adding a switch to a circuit and using it to control a bulb or buzzer
  • Relate the switch concept to everyday switches in the home
“Can your child explain what happens inside the wall when they flip a light switch — that it completes or breaks the electrical loop?”

Curriculum record

Type
Conceptual
Subject
Science
Domain
Energy
Age range
Ages 8–9

Standards

uk-nc-2013:Y4.Sci.E.4