SHS1 Design And Communication Technology · Semester 2 Week 12: Solid Geometry

Lesson notes

Learning Objectives

Indicator: 1.2.2.LI.3 - Draw the surface development of prisms.

By the end of the lesson, learners can:

Define surface development and explain its purpose in solid geometry.
Identify the faces, edges and bases of a prism from a model or chart and state the shapes of each face.
Draw the surface development (net) of a rectangular prism and a triangular prism using drawing instruments with correct measurements.
Add tabs or allowance edges to a developed surface and assemble the net into a finished three-dimensional prism model.
Explain at least one practical trade or career situation where surface development of prisms is used.

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Curriculum details

Strand: Geometry (Strand 2)
Sub-strand: Solid Geometry (2.2)
Content standard: 1.2.2.CS.1 - 1.2.2.CS.1 Apply the concept of solid geometry in designing. 1.2.2.LO.1 Use the understanding of solid geometry to draw three-dimensional objects in isometric, oblique, perspective and design artefact base on solid geometrical figures
Indicator: 1.2.2.LI.3 - Draw the surface development of prisms.
Suggested placement: Semester 2, Week 12 (Week 32 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. 40

Exemplars (from the NaCCA curriculum)

Managing talk for learning, research:
1. Use models, cut shapes, internet surf and charts to assist learners to identify prisms and pyramids as types of solid geometry and describe them based on their properties in a class discussion

Examples of solid geometry are: Prisms and pyramids. Prisms have parallel sides, uniform cross-section and are named after the base. Pyramids have their sides tapered to the top or apex and are named after the shape of the base.
2. Let learners outline some examples of pyramids and prisms and their properties in a chart

Managing talk for learning, problem- based learning: With the use of models, pictures and charts, guide learners to explain the principles of developing the surfaces of prisms and develop given prism surfaces using drawing instruments.

Assessment (1.2.2.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning.

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