Communicating Designs · JHS3 Career Technology

Lesson notes

Learning Objectives

Indicator: B9.5.1.2.2 - Draw objects in first and third angle orthographic projection

By the end of the lesson, learners can:

Sketch a simple object in pictorial form and indicate the directions of the front view, plan and end view with appropriate dimensions.
Draw the three principal views (front view, plan and end view) of a given object in first angle orthographic projection, starting with the front view first.
Draw the three principal views of a given object in third angle orthographic projection, starting with the front view first.
Label each view correctly and add dimensions to the views using projection lines and dimension lines.
Prepare a simple sketch album of two community artefacts drawn in both first and third angle orthographic projection for class appraisal.

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Curriculum details

Strand: Designing and Making of Artefacts/products (Strand 5)
Sub-strand: Communicating Designs (5.1)
Content standard: B9.5.1.2 - Demonstrate understanding of orthographic projections
Indicator: B9.5.1.2.2 - Draw objects in first and third angle orthographic projection
Suggested placement: Term 2, Week 12 (Week 24 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. 106
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Sketch objects in pictorial indicating the appropriate dimensions, and directions of the three views (front view, plan and end view).
2. Draw the three views to the given dimensions, at their respective positions using the appropriate projection lines.
Note: Draw the front view first.
3. Indicate the dimensions on the views and label the views appropriately.
4. Use the idea to prepare detailed drawings of artefacts to be made.
5. Project work: Go round the community, observe artefacts and draw four (4) artefacts in both first and third angle orthographic projections.
6. Prepare a sketch album and present in class for appraisal.