Design and Drawing for… · SHS1 Manufacturing Engineering

Lesson notes

Learning Objectives

Indicator: 1.2.1.LI.2 - Develop the surfaces of models for manufacturing.

By the end of the lesson, learners can:

Define surface development and identify at least three everyday objects that are manufactured from flat sheets of material.
Explain the four methods of surface development (parallel-line, radial-line, triangulation, and approximate) and state which method suits a given shape.
Unfold and refold a paper box along its edges to trace the true shape of each face and lay it flat.
Draw the complete surface development of a cylinder and a cone using drawing instruments, with measurements accurate to the nearest millimetre.
Construct a simple model (cylinder or cone) from paper or thin metal sheet, following the developed layout, and present it to the class with a brief explanation of the method used.

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Curriculum details

Strand: Design and Prototyping (Strand 2)
Sub-strand: Design and Drawing for Manufacture (2.1)
Content standard: 1.2.1.CS.1 - Demonstrate knowledge and skill in the development of surfaces. 1.2.1.LO.1 Use drawing instruments properly to draw the borderline and title block for a drawing. 1.2.1.LO.2 Apply the principle of development of surfaces to develop products. 1.2.1.LO.3 Explain the use of the design process in solving problems. 1.2.1.LO.4 Use freehand sketches and visualisation of objects to express a design idea.
Indicator: 1.2.1.LI.2 - Develop the surfaces of models for manufacturing.
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. 34

Exemplars (from the NaCCA curriculum)

Experiential Learning: Using paper boxes, learners in mixed-ability groups fold and unfold empty boxes along their lines to understand the principle of development of surfaces.
Talk for Learning: Learners discuss the methods of development of surfaces such as parallel-line development, radial-line development, triangulation development and approximate development. Learners add to what others say. Organize contributions using webbing.
Project-Based Learning: Learners in mixed-ability groups develop cones and cylinders at the workshop using the principle of surface development and present their works in class.
Teaching and Learning Materials:
- * Drawing instruments * Paper boxes
- * Textbooks * Metal sheets
- * Supplementary reading materials. * Drawing instruments
Assessment (1.2.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 3 Strategic reasoning.