Institute: Community Services
Unit:Foundation
Foundation Mathematics
Duration: 1 hour
Lesson Pl
Plan: Scale Drawing
Aims
1.
To learn how to interpret a scale.
2.
To learn how
w to use a scale to produce a scale drawing.
Objectives
1.
Using a scale to determine the real size of an object.
2.
Using a scale to determine the real distance between two places.
3.
Using a scale to determine the dimensions of a floor plan on a site map.
Learning Outcomes
By the end of this lesson a student will be able to:
1.
2.
3.
Read and use a scale.
Calculate real dimensions from a scale drawing.
Produce a scale drawing of a floor plan.
Resources
1.
Full whiteboard
2.
MEPA site plans
3.
Topic flashcards & Blu
Blu-tack.
Remote Preparation
1.
N/A
Adaptation
Care gp.1:
Care gp.2:
Explanation should be slow and repetitive due to students who suffer
from attention deficit.
Explanation should be bilingual due to a foreign student in the group.
Mr. Christopher Busuttil – Scale Drawing
Page 1
Institute: Community Services
Unit:Foundation
Foundation Mathematics
Duration: 1 hour
Lesson Pl
Plan: Scale Drawing
Introduction
1.
Attendance
2.
A scale drawing is an accurate representation of a real object. Scale drawings are
usually smaller in size than the original objects. But in certain cases they have to
be enlargements, typical examples of which are miniature electronic circuits and
very small watch movements.
Time: 10 minutes
Development
Part 1: Scale Drawings
In a scale drawing:
All the measurements must be in proportion to the corresponding measurements on
the original object
All the angles must be equal to the corresponding angles on the original object.
To obtain the measurements for a scale drawing, all the actual measurements are
multiplied by a common scale factor, usually referred to as a scale. Scales are often
given as ratios. When the units in a ratio are the same, tthey
hey are normally not given.
Beware when you are making a scale drawing; take care to express all measurements in
the same unit.
Example:
Mr. Christopher Busuttil – Scale Drawing
Page 2
Institute: Community Services
Unit:Foundation
Foundation Mathematics
Duration: 1 hour
Lesson Pl
Plan: Scale Drawing
Look at this plan of a garden, drawn to a scale of 1cm to 10m.
a) State the actual dimensions of each plot of the garden.
b) Calculate the actual area of each plot.
Example:
The following map is drawn to a scale of 1cm to 20km. This means that a
distance of 1cm on the map represents a distance of 20km on the land.
Calculate the
he actual distance between:
(i) Bran and Kelv
(ii) Bran and Dai
Daid
(iii) Daid and Malm
Time: 15 minutes
Part 2: Activity
Divide the class in groups of three. Let each group work as a team. Let each group
choose a MEPA site plan. Instruct each group to calculate the dimensions of each room
of the floor plan chosen.
Time: 30
3 minutes
Mr. Christopher Busuttil – Scale Drawing
Page 3
Institute: Community Services
Unit:Foundation
Foundation Mathematics
Duration: 1 hour
Lesson Pl
Plan: Scale Drawing
Closure/Recapitulation
1.
Map scales.
2.
Floor plans
Time: 5 minutes
Assessment Indicators/Key Questions
1.
Involve students in working out problems related to co-ordinates.
ordinates.
2.
Ask different students to explain their own answers for different examples.
Modifications / Support / Learning Patterns
1.
2.
Assessment Due Date: N/A
Mr. Christopher Busuttil – Scale Drawing
Page 4