SHS2 Manufacturing Engineering · Semester 1 Week 18: Design and Drawing for Manufacture

Lesson notes

Learning Objectives

Indicator: 2.2.1.LI.2 - Explain the application of first angle orthographic projection in product design.

By the end of the lesson, learners can:

Define first angle orthographic projection and state its key characteristics, including the placement of views and the symbol used to identify it.
Identify and label the front, top, and side views of a given object presented in first angle orthographic projection.
Explain why first angle orthographic projection is the preferred standard for product design and manufacturing in Ghana and internationally.
Draw the first angle orthographic projection (front, top, and side views) of simple objects made from snap cubes and other everyday items.
Compare first angle orthographic projection with isometric projection (covered in Week 17) and state when each is more useful in the design process.

Sign in with your phone number to read the full note and download the GES plan - free.

Sign in with phone number

Curriculum details

Strand: Design and Prototyping (Strand 2)
Sub-strand: Design and Drawing for Manufacture (2.1)
Content standard: 2.2.1.CS.2 - Demonstrate that knowledge and understanding of the projection of objects is necessary for product design. 2.2.1.LO.1 Explain the importance of freehand sketch, projection of objects, detailed and assembly drawings in product design and manufacturing.
Indicator: 2.2.1.LI.2 - Explain the application of first angle orthographic projection in product design.
Suggested placement: Semester 1, Week 18 (Week 18 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. 62

Exemplars (from the NaCCA curriculum)

Experiential Learning: Show learners videos or images of real objects such as tables or chairs and their corresponding first angle orthographic views i.e. front, top and side views.
Talk for Learning: Discuss with learners the characteristics of drawings in first angle projection using samples of first angle projection drawings.
Learners think-pair-share and provide, in turns, the first angle orthographic projection of shapes created from snap cubes. Let them share their drawings with colleagues for comments.
- Textbooks
- Isometric papers
- Audio-visuals
Teaching and Learning Materials:
- * Snap cubes
- * Drawing instruments
- * Chats or samples of first angle projection drawings
Assessment (2.2.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.