SHS2 Design And Communication Technology · Semester 1 Week 14: Plane Geometry

Lesson notes

Learning Objectives

Indicator: 2.2.1.LI.3 - Design an artefact using the principle of loci.

By the end of the lesson, learners can:

Explain how the principle of loci (specifically the helix) is applied in the working of a car jack.
Sketch at least two different types of car jacks that operate on the helix principle, labelling the key parts.
Design and draw a functional car jack using the principle of the helix, showing the screw thread, handle, and base in correct proportion.
Justify their design choices by explaining how each part relates to the principle of loci.
Evaluate their own and peers’ designs against a set of assessment criteria covering function, accuracy, and presentation.

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Curriculum details

Strand: Geometry (Strand 2)
Sub-strand: Plane Geometry (2.1)
Content standard: 2.2.1.CS.1 - 2.2.1.CS.1 Apply the concept of plane geometry in designing 2.2.1.LO.1 Use the knowledge of plane geometry to draw plane geometrical shapes and design different artefact based on plane geometrical figures.
Indicator: 2.2.1.LI.3 - Design an artefact using the principle of loci.
Suggested placement: Semester 1, Week 14 (Week 14 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: NaCCA curriculum document, p. 58

Exemplars (from the NaCCA curriculum)

Research, Collaborative learning/ Group Work, Managing talk for learning: Assist learners to use relevant resources to research on the working principles of a car jack and produce pictures and videos of examples of car jacks that works on the principles of helix. Assist learners to present their findings in a whole class discussion.

Activity-based learning, individual learning: Ask learners to provide sketches of examples of car jacks that works on the principles of helix

Individual learning, Activity based learning, Problem based learning: individually to design a car jack using the working principles of the helix

Assessment (2.2.1.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning. Guide learners

Teaching and Learning Materials:
- Models
- Charts
- reference books
- drawing studio
- Drawing instruments
- access to internet
- LCD Projector