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- 1Identify the main stages involved in bringing electricity from power stations to homes.
- 2Ask learners: Where does the electricity that powers Ama's lights at home come from? Invite volunteers to name different sources (hydroelectric dams, thermal plants, solar farms). Write their responses on the board and acknowledge that all electricity must travel a long distance before reaching homes. Ask them to guess what happens to electricity during this journey.
- 3Show learners a simple diagram of a village with a power station on one side and houses on the other. Ask: How do you think electricity moves from here to here? Learners whisper their ideas to their partner, then one pair shares aloud. Explain that today they will learn the actual path electricity takes and why it is sent in a special way.
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- UNDERSTANDING THE THREE MAIN STAGES OF ELECTRICITY TRANSMISSION
- 1Display the Chart/diagram showing the complete electricity transmission system: power station → step-up transformer → transmission lines → step-down transformer → homes. Read each stage aloud with learners, pointing to the chart. Ask: Why do you think electricity needs to be stepped up at the power station before it travels? Learners discuss with a partner before responding. Explain that high voltage allows electricity to travel long distances with less energy loss, like sending a strong signal instead of a weak one.
- 2Divide the class into three groups. Assign each group one stage: Group 1 explains power generation, Group 2 explains transmission, Group 3 explains distribution. Give each group the Textbook pages describing their stage. Ask them to read for 3 minutes and write down one key fact. One representative from each group shares their fact with the class. Confirm and clarify using the diagram.
- 3Struggling learners: provide a simplified 3-step diagram with labels already written; ask them to only name each stage, not explain it.
- ANALYZING HOW VOLTAGE CHANGES PROTECT ELECTRICITY DURING LONG-DISTANCE TRAVEL
- 4Ask learners: If electricity loses power as it travels, how can we make sure homes still get enough? Draw two simple circuits on the board—one showing low voltage over long distance (with energy lost), one showing high voltage over the same distance. Ask: Which one wastes less energy? Learners vote with thumbs up or down. Explain that transformers change voltage: step-up transformers increase voltage for travel, step-down transformers decrease it for safe home use.
- 5Using the Science kit/specimens (if available: transformer models or coils), demonstrate how a transformer works by showing primary and secondary coils. If not available, use the Chart/diagram to point out the coil difference. Ask learners to calculate in their Exercise books: If a step-up transformer takes 240V and steps it up to 25,000V, why is this safer for long-distance travel? (Less current = less heat loss.) A learner who finished first explains their reasoning to the class.
- 6Struggling learners: focus only on naming what transformers do (step up and step down), not on calculating voltage losses.
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- 1Textbook (electricity transmission section)
- 2Chart/diagram (power station to home transmission system)
- 3Science kit/specimens (transformer models or coils, if available)
- 4Exercise book
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- 1Learners draw a quick 4-box comic strip in their Exercise books showing electricity's journey: power station → step up → travel → step down → home. One learner from each ability level volunteers to draw their comic on the board while others check theirs. Ask the class: Is the order correct? Learners give thumbs up if yes.
- 2Ask: Why do you think Ghana's power stations use transformers instead of sending electricity directly to our homes? Learners turn and talk to their neighbour for 1 minute. Select a boy and a girl to share their thoughts. Affirm responses that mention safety and energy saving.
Exercise
- 1Explain what a step-up transformer does when electricity leaves a power station in Ghana. In 3–4 sentences, describe where the electricity goes after this transformer and why this change is important for reaching homes safely.
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- 1Recall the names and basic functions of capacitors, LEDs, diodes, and resistors in electronic circuits.
- 2Display four pictures on the Chart/diagram: a capacitor, an LED, a diode, and a resistor. Point to each and ask: Have you seen this before? What do you think it does? Accept all answers without correction. Learners call out words (glows, stores, blocks, slows). Tell them these are all electronic components that work together, and today they will see how capacitors store and release electricity like a tiny battery.
- 3Ask: What happens when you charge a phone battery? Learners discuss with their partner for 1 minute. Invite a volunteer to explain. Now ask: Imagine a tiny battery that charges and empties very quickly—what would it do? Explain that this is like a capacitor, and today they will watch it charge and discharge in a real circuit.
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- UNDERSTANDING HOW A CAPACITOR CHARGES AND DISCHARGES IN A DC CIRCUIT
- 1Using the Science kit/specimens, set up a simple DC circuit with a battery, a capacitor, a resistor, and an LED. Before connecting, ask: What do you think will happen to the LED when I connect the capacitor? Learners write their prediction in their Exercise books. Connect the circuit. The LED flashes briefly, then goes off. Ask: Why did the LED only flash? Explain: The capacitor charged up (filled with electricity) very quickly, powering the LED momentarily, then stopped because it was full. This is the charging action.
- 2Now add a switch to discharge the capacitor. Close the switch and the LED flashes again as the capacitor empties. Ask learners: What just happened? Discuss: The capacitor released its stored electricity—this is discharging. Repeat the charge-discharge cycle 3 times while learners observe. Ask: How is a capacitor like a water tank that fills and empties? Learners answer using the Textbook definition of capacitance if available.
- 3Struggling learners: focus only on observing and naming the two actions (charging and discharging) without explaining the electrical mechanism.
- EXPLAINING THE ROLES OF CAPACITORS, LEDS, DIODES, AND RESISTORS IN ELECTRONIC CIRCUITS
- 4Draw a simple circuit diagram on the board showing all four components labelled. Point to each and ask learners to match it to its job using the Textbook or Chart/diagram. Capacitor: stores and releases electricity. LED: glows when current flows. Diode: allows current to flow one way only. Resistor: slows down the flow of electricity. Learners copy this matching list into their Exercise books with a simple sketch of each symbol.
- 5Place learners in pairs. Give each pair a different scenario: Pair 1—Why would an LED need a resistor? (To prevent burning out by limiting current.) Pair 2—Why would a circuit need a diode? (To protect components by blocking reverse current.) Pair 3—Why does a capacitor charge slowly if the resistor is large? (The resistor slows the flow of charging current.) Pairs research using the Textbook or Teacher explanation, then share their answer to the class. Affirm correct reasoning.
- 6Struggling learners: provide a labelled diagram showing where each component goes in the circuit and only ask them to name what each does, not explain why.
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- 1Science kit/specimens (DC power supply, capacitor, resistor, LED, diode, wires, switch)
- 2Textbook (capacitors and electronic components section)
- 3Chart/diagram (circuit symbols and component functions)
- 4Exercise book
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- 1Learners work in small groups. Give each group one component (capacitor, LED, diode, or resistor) written on a card. They create a 1-minute mime or role play showing what their component does in a circuit—the capacitor can crouch and jump up (charge and discharge), the LED can shine, the diode can show a one-way gate, the resistor can walk slowly. Groups perform while others guess the component. This consolidates understanding through creative movement.
- 2Ask the class: In what real device have you seen these components working together? Learners suggest examples (phone charger, torch, radio, TV). Select a learner who is less confident and ask: Why would a capacitor be useful in a torch? Pair them with a stronger peer to discuss. The pair shares their idea with the class.
Exercise
- 1Using the Science kit/specimens or a diagram, demonstrate the charging and discharging action of a capacitor. In your Exercise book, draw and label a DC circuit containing a capacitor, a resistor, an LED, and a battery. Then explain in 3–4 sentences what happens when you close the switch: What does the capacitor do? Why does the LED light up and then go dark?
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