4b - Let There be Fairtrade Light - Part 2
In this lesson the children explore the conductivity of different materials and how to make circuits in the context of Chinangwa Village in Malawi, whose inhabitants can now access electricity.
This lesson plan links to Curriculum aims and programmes of study in Science, Design & Technology and Geography, and to non-statutory programmes of study in Citizenship.
To investigate the conductivity of different materials and the effect of changing the power source.
Children have explored this in the context of Malawi, can make and break a circuit and understand how electricity works.
Range of electrical components: a collection of batteries, insulated wires and matched bulbs or buzzers.
Pupils discuss in pairs what they remember from the previous lesson about the ways in which electricity has improved the lives of the villagers. Remind the class that Joyce, Alfred and Ehud were able to get electricity because of Fairtrade.
Ask pupils to name as many electrical components as they can and record on the board. Show the class the collection of components and see if the children can match them to the words and explain the function of each. Do they know what each part is made of?
Elicit from the class that the connections within the circuits are all made of metal because electricity flows through metal. Write the words conduct and conductor on the whiteboard. Are all metals conductors? Are only metals conductors? Ask the class how they can investigate this question and find out.
Investigate the electricity generating process. Present children with a collection of batteries, insulated wires and matched bulbs or buzzers. Challenge them to make the bulb light or buzzer sound. What components do they need to make the circuit work? Pupils draw pictures to show their working circuits and label their drawings indicating why the circuits work.
Give each student a piece of red, green and yellow paper. Ask a series of questions such as those below to which they raise green if they agree/think the answer is yes; red if they disagree/the answer is no and yellow if they’re not sure/don’t know the answer.
e.g. Electricity flows through metal
Not all metals are conductors
Fairtrade has made a big difference in the lives of Joyce, Alfred and Ehud.
Once confident with basic circuits, as an extension activity you may want to present children with a selection of materials to make a circuit and buzzers and bulbs. Ask children to suggest a relevant problem that needs to be solved e.g. make a house with a light in it. Children identify solutions and create one.