Simple Structures and… · JHS3 Career Technology

Lesson notes

Learning Objectives

Indicator: B9.4.1.1.1 - Describe mechanisms used for making products/ artefacts

By the end of the lesson, learners can:

Define a mechanism in their own words and give at least two everyday examples of mechanisms found in Ghanaian homes or communities.
Identify and name at least five different types of mechanisms (pulley system, chain and sprocket, gear system, screw mechanism, crank mechanism, cams, levers and linkages) from pictures, videos or real objects.
Classify common artefacts found in their environment according to the mechanism they operate on.
Use digital tools (phones, tablets or computers where available) to research how at least two mechanisms operate and present their findings in a clear, ordered manner to the class.
Work in groups to describe the basic working principle of at least three mechanisms using correct technical vocabulary.

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Curriculum details

Strand: Technology (Strand 4)
Sub-strand: Simple Structures and Mechanisms, Electric and Electronic Systems (4.1)
Content standard: B9.4.1.1 - Demonstrate knowledge of mechanisms in projects construction
Indicator: B9.4.1.1.1 - Describe mechanisms used for making products/ artefacts
Suggested placement: Term 2, Week 7 (Week 19 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Career Technology, Common Core Programme (JHS1-JHS3), 2023, p. 100
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Explain what is meant by mechanisms.
E.g. It is a system of parts working together in a machine; a piece of machinery.
2. Explore different types of mechanisms using ICT tools and other sources.
E.g.
- Pulley system
- Chain and sprocket system
- Gear system
- Screw mechanism
- The crank mechanism
- Cams
- Levers and linkages
3. Identify artefacts in the environment that operate on mechanisms. E.g., bicycles, vehicles, motor bikes.
4. Research from different sources on how mechanisms operate, in groups.
5. Write findings and present in class for discussion.