Proportion

1. SELF DESIGNED
INNOVATIVE LESSON
RATIO AND PROPORTION
THANSEELA .N
MATHEMATICS REG NO:
13386008
2013-2014

2. Name of the teacher: Thanseela
Name of the school : G.G..H.S.S.Pattom
Subject : mathematics
Unit : ratio and proportion
Sub unit : proportion
Class : 8
Division : E
Strength :34/37
Duration : 45 min
Date : 17/7/2014
CURRICULAR STATEMENT
To give concept of proportion
CONTENT ANALYSIS
TERMS : fraction, ratio, proportion
FACTS : ratio can be used to compare parts of a single thing.
CONCEPT: Individual quantities change, but ratio remain same is called proportion.
PROCESS: process of teaching and learning of proportion
PROCESS SKILS: observing, classifying, finding, analyzing, interpreting, calculating

3. LEARNING OUTCOMES
The pupil,
i. remember the facts, concept,…, related to ratio
ii. develop understanding above facts, concepts,…,related to proportion
iii. applies the above facts, concepts,…,related to proportion
iv. detects the above facts, concepts,…,related to proportion
v. discriminates the above facts, concepts,…,related to proportion
vi. design a new idea related to proportion
vii. develop skills related to proportion
viii. create interest in concept proportion
PRE-REQUISITES: concept of fraction, ratio
LEARNING AIDS: activity sheet, chart, ordinary class room equipments.
LEARNING STRATEGIES : group activity, group discussion.
Interaction procedure Pupil response
Teacher introduce a new concept to students
Teacher shows different pictures, things to students and ask to observe them.
Students listen
Students actively participated

4. Group 1
Group2
Group 3
Students keenly observe the pictures
First group response that both pictures are same. But
different in size.
Second group response that they are same pictures but different
in size
Third group response that they are same pictures but different in
size

5. Group4
Teacher explain that these pictures are same but different in size. Can you say
what property is this?
Teacher give another group activity.
group1
To find ratio of each rectangle
And find which have same ratio
A B C
Fourth group also response that they are same pictures but
different in size.
students listen and give many answers

6. Group 2
find ratio of each triangle And find which have same ratio
fig(a) fig(b)
fig(c)
Group3
And find which have same ratio
fig(a) fig(b) fig(c)
Students do interestly
Fig(a) I:b = 2:1
Fig(b) l:b= 4:2=2:1
Fig(c) l:b = 5:2
Figa and fig b have same ratio
Figure(a) black : orange 2:1
Figure(b) black : orange 2:2=1:1
Figure(c) black : orange 4:2 =2:1
figure (a) and figure (c) have same ratio
Figure(a) ratio of sides 2:2:2:2=1: 1:1:1
Figure(b) ratio of sides 4:4:4:4 = 1:1:1:1
Figure(c) ratio of sides 2:4:2:4=1:2:1:2

7. Group4
 two cups of water and one cup of milk
 six cup of water and 4 cup of milk
 nine cups of water and six cups of milk
Class assignment
Measure the sides of triangle and Check the proportionality of the
Following triangle.
Figure (a) and figure (b) have same ratio.
 Water : milk= 2:1
 Water: milk = 6:4= 3:2
 Water : milk= 9:6= 3:2
Second and third have same ratio.
Students read the chart and understand the concept of ratio.
Proportion
Individual quantities
change but ratio remain
same

8. i. fig a fig b
Review
What you mean by proportion?
Follow up activity
Home assignment
1. Verify whether your Mathematics text book and note book is
proportional or not?
2. Collect three same things and check proportionality?
Enrichment activity
Suggest a method to check proportionality .
Students do
Figa 3:3:3= 1:1:1
Figb 2:2:2=1:1:1
So these two figures are proportion.
Individual quantity different but ratio remain same is called a
proportion.
Students write down the questions..