This document provides a lesson plan for teaching equations and different changes to equations to 8th standard students. The lesson introduces key terms like equations and concepts of multiplication and division in single problems. Students will learn to identify different changes in equations, explain terms, illustrate examples, detect errors, compare equations and suggest methods. Through group activities and discussions, students will solve example equations, understand inversions, and recognize how to derive the original number from the changed result. The goal is for students to understand different changes that can occur in equations and be able to solve various equation problems.

1. Curricular statement : To understand about different changes of equations and
importance in mathematics through discussion,
observation, organization of charts and
analyzing the prepared notes of the pupil.
Content Analysis
New terms : Equations
Facts : Inverse of addition is subtraction and inverse of multiplication is
division
Concepts : Concept of multiplication and division in a single problem
Process : Process of finding the solution from problem.
Learning outcomes
The pupil will be able to :
1. recall the terms addition, subtraction, multiplication and division
2. recognize different changes
3. identify the concept of different changes in an equation
4. explain the term equations
5. give illustrations for equations
6. detect errors while finding different changes of equations
7. compare different equations
8. suggest different method to find different changes of equations
9. discuss the different changes of equations with other student
Name of the teacher : Anju M
Subject : Mathematics
Unit : Equations
Subunit : Different changes
Name of the school : M T G H S
Standard : 8
Strength :40/41
Date : 29/07/2015
Time : 40 mints

2. 10. ask questions to know more about equations
11. observe all aspects of different changes occur in equations
12. read charts quickly and accurately
13. generate new equations involving different changes
14. plan to do problems on different changes of equations.
Pre-requisites : The students have knowledge on addition, subtraction,
multiplication and division.
Teaching learning : usual class room aids, chart
resources
Learning strategies : group discussion , individual work , observation ,
activity, chart and by analyzing the prepared notes
of the pupil.
Class room interaction procedure Expected pupil responses
Introduction
Activity -1
1. Do you buy books from the shop ?
Pens? Teacher ask to the students.
2. What is the cost of one book?
3. What is the cost of one pen?
4. If you buy a 7 rupee book and 2
rupees pen, the what is the total cost?
Asking these type of questions and teacher
introduce the topic.
Presentation
Activity -2
Teacher asked a questions to the students
23 rupees was spent in buying two note
Pupil says yes.
Different rates, pupil says.
Different prices, pupil says.
Pupil says the correct answer.
Most of the pupil says the correct

3. books and a pen of 3 rupees. What is the
price of a note book?
Teacher explains the answer and write it on
the blackboard.
The total cost became 23, when a pen of 3
rupees was also bought.
Suppose the pen was not bought. What is the
cost?
„Yes‟ teacher replied.
This 20 rupees is the price of two books. So
the price of one book ?
„yes, correct teacher replied.
So two books 10 rupees each cost 20 rupees
and 3 rupees for the pen.
So the total is 23 rupees
Activity 3
1) Teacher ask next question to students
„When a number is tripled and then two
added, it became 50. What is the number?‟
Teacher shows a chart and explains the
answer.
Activity -4
Then teacher give them a problem to find the
answer.
Pupil says 20 rupees.
Pupil says 10 rupees
Pupil understand the answer.
Pupil draws it on their note book.

4. answer on their note book individually.
“When a number is tripled and two
subtracted , it became 40. What is the
number ?
Then teacher ask what do you have
understand from these question?
Then teacher shows a chart with the principle
of inversion method.
“To get the number if we know the result ,
change division to multiplication and
multiplication to division , positive numbers
to negative numbers and negative numbers to
positive numbers.”
Closure
Activity -5
Teacher summarizes the class by telling the
concept of different changes of equation
using addition, subtraction, division and
multiplication.
Review
Activity -6
Each group is asked to form questions on
this topic and teacher ask them what they
have to learnt.
Follow-up activities
1. When a fourth of a number is added to the
number , 30 is got. What is the number?
Pupils find the answer using the
same procedure.
Some pupil responds.
Pupil responds well.