SHS2 Design And Communication Technology · Semester 1 Week 19: Solid Geometry

Lesson notes

Learning Objectives

Indicator: 2.2.2.LI.1 - Demonstrate the use of basic concepts of CAD in developing drawings.

By the end of the lesson, learners can:

Explain what Computer Aided Design (CAD) is and justify why designers and engineers use CAD instead of manual drawing methods.
Launch the AutoCAD interface on a computer and correctly identify at least six major interface components (pallets): the application menu, quick access toolbar, ribbon, drawing area, command window and status bar.
State the function of each major interface component identified and set up a new drawing by choosing the appropriate units, scale and drawing area size.
Use the basic drawing tools in AutoCAD (line, circle, rectangle and polyline) to produce a simple plane figure such as a floor plan outline or a geometric shape.
Save a completed CAD drawing in the correct file format and retrieve it for further editing.

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Curriculum details

Strand: Geometry (Strand 2)
Sub-strand: Solid Geometry (2.2)
Content standard: 2.2.2.CS.2 - 2.2.2.CS.2 Use the knowledge of AutoCAD to draw simple plane figures. 2.2.2.LO.1 Based on the understanding gained from the study of the concepts of solid geometry, construct complex solid geometrical objects. 2.2.2.LO.2 Use the knowledge of AutoCAD to draw simple plane figures.
Indicator: 2.2.2.LI.1 - Demonstrate the use of basic concepts of CAD in developing drawings.
Suggested placement: Semester 1, Week 19 (Week 19 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. 64

Exemplars (from the NaCCA curriculum)

Experiential learning, managing talk for learning:
1. Assist learners to explain CAD and why there is the need to use CAD. Computer Aided Design (CAD) means designing and drafting with the aid of a computer. Design is creating a real product from an idea. Drafting is production of the drawings that are used to document a design. It is important to use CAD because it is faster to create complex designs.
2. Assist learners to launch the CAD interface and identify the pallets. Examples of pallets are application menu, quick access toolbar, info centre, ribbon, status bar, command window, drawing area, properties toolbar user coordinate system (UCS).
3. Assist learners to state the uses of the various pallets identified. Assist learners to set the drawing area i.e the unit, the scale and the size of drawing area.
4. Demonstrate the use of the basic drawing tools in CAD for learners to practise.

Assessment (2.2.2.AS.1). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.

Teaching and Learning Materials:
- Computer laptop
- computer desktop
- windows tablet
- computer mouse
- autocad architecture desktop
- optitex/pattern design
- LCD projector
- Access to internet