Circuits in Action

Overview

Students build on the idea of energy use in everyday contexts by using the Circuit Construction Kit to investigate how electric circuits work. They will identify common components, construct simple circuits, and observe what happens when variables change (such as adding/removing components or changing connections).

Learning intentions

• Students will describe the purpose of key components in an electric circuit using correct scientific language.
• Students will build simple series circuits using a safe, step-by-step procedure in a simulation.
• Students will observe and explain the effect of changes in a circuit (e.g. battery position, switch state, number of components).
• Students will follow a planned procedure to undertake a safe and valid investigation using the simulator.

Success criteria

• I can name circuit components and explain how each one affects the circuit’s function.
• I can build a circuit that correctly produces a complete path for electric current.
• I can describe what changes in the circuit and link these changes to observable effects.
• I can record results clearly and follow the investigation steps without skipping parts.

Curriculum links

• SCLS-EGU-01: Students describe the use of energy in familiar contexts (electricity used to power devices).
• SC4-WS-03: Students plan safe and valid investigations (identify what changes, what stays the same, and what to measure/observe).
• SC4-WS-04: Students follow a planned procedure to undertake safe and valid investigations (step-by-step method for building/testing).
• SCLS-WS-04: Students safely participate in an investigation by following a sequence (using the simulation as the investigation tool).

Lesson structure (60 minutes)

1. 0–8 min · Hook (simulation prediction). Teacher projects the introduction slides and shows a circuit where a lamp is off; the teacher asks what must be different for it to light. Students do a quick think-pair-share and note one prediction in their books (e.g. “the circuit is not complete” or “the switch is open”).

2. 8–18 min · Direct teach (components and circuit idea). Teacher uses the introduction slides to introduce/recap circuit components in the simulator (battery/power source, wires/leads, switch, lamp/bulb) and the key idea of a complete circuit path. Students record a short table: “Component → What it does → What I might observe when it changes” and add one example from home (e.g. torch, doorbell, phone charger).

3. 18–28 min · Guided build (first circuit). Teacher sets up the investigation sequence using the introduction slides:

• Step A: Place battery and lamp.
• Step B: Add wires to complete the path.
• Step C: Add a switch and check the circuit state. Students follow the sequence in the simulation on their device/pair set-up, aiming to make the lamp light. Teacher circulates using prompting questions: “What part makes the circuit complete?”, “Which change caused the lamp to turn on?”

4. 28–40 min · Investigation 1 (controlled change). Teacher reminds students of the planned procedure and validity: choose one variable to change, keep others the same, and observe the effect (using the introduction slides). Students complete the first guided activity on the circuit effects worksheet: change only the switch state (open vs closed) and record whether the lamp is on/off and a one-sentence explanation linked to “complete path/current.” Teacher checks halfway: students should have consistent observations and clear notes.

5. 40–52 min · Investigation 2 (series change). Teacher returns to the introduction slides for a second scenario: “What happens if we add/remove one wire connection or remove a component from the path?” Students use the circuit effects worksheet to test one change while keeping the others constant (teacher choice: remove a section of wire to break the path, or remove/add a component like the switch). Students record: what changed, what stayed the same, what they observed, and their explanation.

6. 52–58 min · Share and consolidate (whole class). Teacher facilitates a class discussion using prompts on the introduction slides:

• “What does ‘complete circuit’ mean in your observations?”
• “How did your evidence support your explanation?” Students share one result from their worksheet, focusing on cause-and-effect language.

7. 58–60 min · Exit ticket (quick formative assessment). Teacher collects responses from the circuit effects worksheet or uses a one-question written exit ticket on the back: “Draw and label a complete circuit that will light a lamp, and write one sentence explaining why it lights.” Teacher scans for correct component identification and “complete path” explanations.

Resources

• the introduction slides
• the circuit effects worksheet
• Student devices or classroom computer access for the circuit simulation (Circuit Construction Kit)
• Projector/interactive display for teacher demonstration
• Pens/pencils and exercise books for notes and exit response
• Seating in pairs with one device per pair (or teacher manages one device per small group)
• Checklist for teacher observation during guided builds (lamp on/off, records completed)

Assessment

• Formative during guided build: teacher observes whether students follow the sequence and can achieve a complete circuit.
• Formative during investigations: students’ worksheet entries show clear “change/constant/observation/explanation.”
• Summative-ish exit check: ability to draw/describe a complete circuit and link it to observable effect (lamp on).

Differentiation

• Support: provide sentence starters on the circuit effects worksheet such as “When I changed ___, the lamp ___ because ___.”
• Support: pre-teach key words shown on the introduction slides (battery, switch, lamp, complete circuit).
• Extension: challenge students to predict what happens before testing (e.g. “If I move the switch position, will the lamp behaviour change? Test and justify.”).
• EAL/SEN: offer a visual model of a complete circuit (simple diagram) for students to copy and modify; allow verbal explanation to accompany written responses.