lesson template

1. INNOVATIVE LESSON
TEMPLATE
Presented by
Aswathy Ajayan
Mathematics
Reg. No. 13973004
KUCTE, KOLLAM

2. Name of the teacher Aswathy Ajayan Std & Div IX
Name of the School Period
Subject Mathematics Strength
Std & Div IX Time 40`
Unit Circles Date
Topic A new number
CURRICULAR OBJECTIVES
To convey the concept “휋”
CONTENT ANALYSIS
TERMS : Circle, radius, diameter, perimeter
FACTS :
 The radius of a circle is half of its diameter
 The circled measurement of a circle is its circumference
 When we divide the circumference of a circle with its diameter we got the constant number, 휋
 A circle with radius ‘r’ , whose circumference is 2 휋r. 4

3. CONCEPT : The concept ‘휋’
FORMULAE : 휋 =
퐶푖푟푐푢푚푓푒푟푒푛푐푒
푑푖푎푚푒푡푒푟
SYMBOLS : r radius, 휋 =
22
7
≅ 3.141
LEARNING OUTCOME
Students will be able to;
1. Recalls about circle
2. Recognizes radius of circle and diameter of circle.
3. Understands the concept of 휋
4. Exemplify different situations to analyze the concept.
5. Apply the above concept in familiar situation.
6. Accept the beauty of mathematical principles.

4. PRE-REQUISITES
The pupil knows about,
 Circle
 Radius
 Mathematical calculations
TEACHING LEARNING RESOURCES
 Chart showing definition
 Ordinary classroom teaching aids.

5. CLASS ROOM INTERACTION PROCEDURE RESPONSES
Introduction
Activity No. 1
Teacher divides the whole class into 4 groups and giving the
models of circle to each group. Teacher asks students to find
out the radius, diameter and the relations between them
PRESENTATION
Activity No. 2
Then the teacher gives thread to each group and to find out the
circumference using the thread.
Activity No. 3
Teacher gives activity cards to each group and asks to find out
the radius, diameter, circumference and
푐푖푟푢푚푓푒푟푒푛푐푒
푑푖푎푚푡푒푟
They measures the radius and diameter and find
out that 2xradius = diameter
Students find out the circumference using
thread and scale
Students find out each measurement
2 8 12
2 2 10 14

6. Activity No. 4
Teacher concluding the measurements in the black board
Group Radius Diameter Circumference 푐푖푟푐푢푚푓푒푟푛푐푒
푑푖푎푚푒푡푒푟
I 2 4 12.5 3.14
II 3 6 18.84 3.14
Teacher asks to find out the principle
 From this teacher concluded that when we divide
circumference with diameter we will get a fixed number,
this number is denoted as 휋 in Greek letter, William
Johns coined this name in AD 1707 , the value of this
number is 22/7 and find decimal value is 3.14.
 Teacher shows the chart and gives the note.
The fixed number 흅
When we divide the circumference of a circle with its diameter
we will get a fixed number. This fixed number is denoted by the
Greek letter ‘휋′
Students said that when we divide
circumference with diameter we will get a fixed
number

7. APPLICATION
The circumference of a circle is 25.12 cm, diameter is 8 cm,
then find the value of 휋?
 What is to be find out?
 What is the value of circumference?
 How much is the diameter?
 Then what is the radius?
 How can we find out the value of 휋?
 Then find out the value
 Is the value right or not?
The value of 휋
25.12 cm
8 cm
4 cm
Divide the circumference with diameter.
휋 =
25.12
8
= 3.14 푐푚
Right

8. Review
 What will get from the division of circumference of a circle with diameter.
 What is the value of 휋?
Follow up activity
 Construct a circle with radius 7cm. find out the diameter circumference and divide these values to find out
휋?