Resistant Materials · JHS3 Career Technology

Lesson notes

Learning Objectives

Indicator: B9.2.2.1.2 - Discuss the reasons why resistant materials require particular techniques and tools for their safe handling and use

By the end of the lesson, learners can:

Explain why specific tools are matched to specific resistant materials, giving at least two examples of what happens when the wrong tool is used.
State the correct safety precaution for at least four different working processes on resistant materials.
Demonstrate the correct way to check and set a bench plane before use.
Demonstrate the correct method of fitting a hacksaw blade, with teeth pointing away from the handle.
Justify, in a short oral or written explanation, why both hands must always stay behind the cutting edge when using sharp tools.

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Curriculum details

Strand: Materials for Production (Strand 2)
Sub-strand: Resistant Materials (2.2)
Content standard: B9.2.2.1 - Demonstrate skills in selecting resistant materials for making products/artefacts
Indicator: B9.2.2.1.2 - Discuss the reasons why resistant materials require particular techniques and tools for their safe handling and use
Suggested placement: Term 1, Week 8 (Week 8 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. 87
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Explain why specific tools are used to work on specific resistant materials.
E.g. Saws designed for woodwork should not be used to cut metals else the cutting edge will become blunt.
2. Relate the correct safety precautions to the appropriate process in working with resistant materials when making an artefact.
E.g.
- When planning wood, check that the plane is sharp and correctly set.
- When using sharp edged tools, always keep both hands behind the cutting edge.
- Fix the hacksaw blade such that the teeth point away from the handle/ operator.