SHS2 Design And Communication Technology · Semester 1 Week 12: Plane Geometry

Lesson notes

Learning Objectives

Indicator: 2.2.1.LI.1 - Draw orthographic projections of given objects.

By the end of the lesson, learners can:

Identify the six principal views (front, top, bottom, left side, right side, rear) used in orthographic projection and state the difference between first-angle and third-angle projection systems.
Position an object correctly within the three principal planes (vertical, horizontal, and profile planes) to generate its front, top, and side views.
Draw the front, top, and side orthographic views of a given simple solid object using first-angle projection, with correct alignment and proportion (Level 2: Skills of conceptual understanding).
Construct the third-angle projection of the same object and compare the placement of views between the two systems (Level 3: Strategic reasoning).
Measure and transfer dimensions accurately from one view to another using a drawing board, T-square, set squares, and compass, producing a clean, labelled drawing.

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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.1 - Draw orthographic projections of given objects.
Suggested placement: Semester 1, Week 12 (Week 12 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)

Managing talk for learning, Activity based learning: Through demonstration and the understanding gained from the concepts of plane geometry, assist learners to draw Orthographic Projections in first and third angles.

Activity based learning: Use the knowledge gained from the principles of drawing orthographic views to find the true lengths, true angles of inclination and traces of lines in space

Assessment (2.2.1.AS.1). 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
- reference books
- drawing studio
- Drawing instruments
- access to internet
- LCD Projector