SHS3 Design And Communication Technology · Semester 2 Week 12: Mechanical Drawing

Lesson notes

Learning Objectives

Indicator: 3.3.2.LI.2 - Prepare assembly drawing from component parts

By the end of the lesson, learners can:

Identify the component parts of a given object and state the quantity of each part needed for assembly.
Prepare a bill of materials for a simple mechanical object, numbering each part and recording its quantity.
Produce an assembly drawing in pictorial form showing how the component parts fit together.
Draw a sectional assembly view to reveal the interior arrangement of the component parts.
Construct an exploded assembly drawing to show the order and flow of assembly, using appropriate drawing instruments and scale.

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Curriculum details

Strand: Extended Drawing (Strand 3)
Sub-strand: Mechanical Drawing (3.2)
Content standard: 3.3.2.CS.1 - 3.3.2.CS.1 Understand the concept of Mechanical drawing. 3.3.2.LO.1 Apply the concept of assembly and working drawings in applied technology.
Indicator: 3.3.2.LI.2 - Prepare assembly drawing from component parts.
Suggested placement: Semester 2, Week 12 (Week 32 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. 102

Exemplars (from the NaCCA curriculum)

Experiential learning, Activity-based learning:
1. Let learners look around in the classroom, outside the classroom and mention some objects or artefacts they see.
2. Write the names of the objects or artefact on the board and help learners identify the parts making the objects or the artefact mentioned.
3. Ask learners to find out the quantity of each part, give each item/part a number and make a bill of materials for the parts.

Activity- based learning:
1. Guide learners to measure the parts and draw them using the appropriate drawing tools. Through You Tube videos, board illustrations, charts and simulations, demonstrate the assembly drawing of the parts first in a picture form, then in section to show the interior view of the parts and then the exploded view also to show the flow of the assembly of the parts
2. Assist learners to prepare assembly drawing to scale using the appropriate drawing tools

Assessment (3.3.2.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning.

Teaching and Learning Materials:
- Models
- charts and drawing instruments
- such as set-squares
- protractor
- pair of compasse
- dividers
- reference books
- drawing studio
- access to internet
- LCD Projector.