1. LESSON PLAN
Name of the teacher : Deepu Krishnan R Name of the schoo l :Govt :H.S.S
Punalur
Subject :Mathematics Standard : IX
Unit :Irrational numbers Strength :39
Sub unit : idea about irrational numbers Date :22/07/2014
Time :40 min
CURRICULAR STATEMENT:
The pupil understand problem and thereby in mathematics through
discussion, observation and analyzing the prepared notes of the pupil
CONTENT ANALYSIS:
New terms : irrational numbers, approximate values
Facts : Integers and fractions are collectively called rational
numbers
Concept : concept of irrational numbers
Process : Process of finding the approximate value of irrational numbers
CURRICULAR OBJECTIVES:
To find the approximate value of √2
LEARNING OUTCOMES:
The pupil
1. Will recall the tern square of a number
2. Will identify a irrational numbers
2. 3. Explains the concept of irrational numbers
4. Ask questions to know more about irrational numbers
5. Does oral and written calculation speed and accurately
6. Be able to compare the rational numbers and irrational numbers
7. Is able to frame problems related to irrational numbers
8. Recognizes the qualities of exactness, accuracy while doing problems on
irrational numbers
9. Plans to do problems on irrational numbers
10. Generate new ideas on irrational numbers
PRE-REQUISITES:
Pupils have knowledge on irrational numbers
TEACHING-LEARNING RESOURCES:
Usual classroom aids, chart
LEARNING STRATEGIFS / APPROACHES:
Meaningful verbal explanation, observing charts, observation, group
discussion
Content/major concepts Classroom interaction procedure Expected
response/evaluation
INTRODUCTION
ACTIVITY-1
√2 is a irrational number
PRESENTATION
ACTIVITY-2
√2(3 decimel) =1.414
√2(5decimal)
Teacher asks:
What is meant by irrational numbers?
What are its characteristics?
Through this idea teacher introduces the
topic
Here we find the approximate value of √2.
We have seen that √2=1.4, 1.41, 1.4142..
The value of √2 is corrected to three
decimal places is 1.414
Then value of √2 corrected to five decimal
place is 1.41421
Pupil will respond
Pupil will listen
3. √2(4decimal)
Activity 3
√3=(1.73, 1.732, 1.7320...
√3(3decimal)=1.732
√3(4decimal)=1.7320
√3(5decimal)=1.73205
Closure
Activty 4
The value of √2 corrected to two decimal
place is 1.41
Then the value of √2 corrected to four
decimal place is 1.4142
The teacher asked the student to find the
different decimal place value of √3
√3=1.73, 1.732, 1.7320...
The value of √3correct to three decimal
place is 1.732
The value of √3correct to four decimal
place is 1.7320
Then the value of √3correct to five
decimal place is 1.73205
Teacher explain steps to find the absalute
value of the irrational nu,mber
Pupil will listen
Pupil will understand
Pupil will think and
write
Pupil will listen
4. Review
Activity 5
FOLLOWUP ACTIVITIES
pupil ask questions and clear the doubts
Find the value of
a) 2∕√2
b) 3∕√3
Pupil will do
