MATHEMATICS LESSON PLAN
GRADE 8
TERM 1: JANUARY – MARCH
PROVINCE:
DISTRICT:
SCHOOL:
TEACHER’S NAME:
DATE:
DURATION:
1
Hour
1. TOPIC: INTEGERS: Calculations with integers (Lesson 3)
2. CONCEPTS & SKILLS TO BE ACHIEVED:
By the end of the lesson learners should know and be able to do addition and
subtraction with integers.
Grade 8 Lesson Plan: 1+4 Intervention-Term 1
INTEGERS: Calculations with integers (Lesson 3)
(Draft)
Page 1 of 4
3. RESOURCES:
4. PRIOR KNOWLEDGE:
Textbooks, DBE workbook 1, Sasol-Inzalo Book 1.

count forwards and backwards in integers at given intervals

identify additive inverses

perform addition and subtraction of whole numbers
5. REVIEW AND CORRECTION OF HOMEWORK (suggested time: 10 minutes)
Homework provides an opportunity for teachers to track learners’ progress in the mastery of
mathematics concepts and to identify the problematic areas which require immediate attention.
Therefore it is recommended that you place more focus on addressing errors from learner
responses that may later become misconceptions.
6. INTRODUCTION (Suggested time: 10 Minutes)
Ask the learners why the following are correct:
a) 5 + (−5) = 0
b) (−10) + 10 = 0
The answers to the above should be alluded to additive inverses.
Use the idea of additive inverses to explain why each of these statements is true:
1. 43 + (−30) = 13
 13 + 𝟑𝟎 – 𝟑𝟎 = 13
2. 150 + (−80) = 70
 70 + 𝟖𝟎 + (−𝟖𝟎) = 70
Through guided instruction learners should realise that additive inverses have been used to
perform calculations with integers.
Grade 8 Lesson Plan: 1+4 Intervention – Term 1
INTEGERS: Calculations with integers (Lesson 3)
(Draft)
Page 2 of 4
7. LESSON PRESENTATION/DEVELOPMENT (Suggested time: 20 minutes)
Teaching activities
Addition of positive integers:
Explain to learners that addition of positive integers is
the same as the addition of whole numbers.
Learning activities
(Learners are expected to:)
complete the following activity 1 to illustrate this
fact:
a) 18 + 12 =
b) 12 + 18 =
For example: (+3) + (+6) = 3 + 6 = 9
Also
(+6) + (+3) = 6 + 3 = 9
Addition of negative integers
c) (+4) + (+6) =
d) (+6) + (4) =
do the following activity 2 to illustrate this fact:
Explain that addition of negative integers is the
same as the addition of positive integers, but the sign
a) (−18) + (−12) =
is negative.
b) (−12) + (−18) =
c) (−2) + (−4) + (−6) =
For example: (−3) + (−6) = −9
Also
d) (−6) + (−4) + (−2) =
(−6) + (−3) = −9
Present the following examples to the learners.
do the following activity 3 to illustrate this fact:
Addition of positive and negative integers:
a) (−18) − (−12) =
a) 20 + (−15) = 20 − 15 = 5
b) 12 − (−12) =
Adding a negative number has the same effect
c) (−4) − (−6) =
as subtracting a natural number.
b) (−8) + 8 = 0
When you add a number to its additive inverse,
the answer is always (zero) 0.
Subtraction of integers:
c) 20 − (−5) = 20 + 5 = 25
d) (−20) − (−5) = −20 + 5 = −15
Subtracting a negative number has the same effect
as adding a natural number.
8. CLASSWORK (Suggested time: 15 minutes)
Sasol-Inzalo Book 1 p 37 no. 7 – 9
Grade 8 Lesson Plan: 1+4 Intervention – Term 1
INTEGERS: Calculations with integers (Lesson 3)
(Draft)
Page 3 of 4
9. CONSOLIDATION/CONCLUSION & HOMEWORK (Suggested time: 5 minutes)
a) Emphasise that:

Commutative property does not apply for subtraction of integers.

Adding a negative number has the same effect as subtracting a natural number.

Subtracting a negative number has the same effect as adding a natural number.
b) Homework
The primary purpose of Homework is to give each learner an opportunity to demonstrate mastery of
mathematics skills taught in class. Therefore Homework should be purposeful and the principle of
‘Less is more’ is recommended, i.e. give learners few high quality activities that address variety of
skills than many activities that do not enhance learners’ conceptual understanding.
Carefully select appropriate activities from the Sasol-Inzalo books, workbooks and/or textbooks
for learners’ homework. The selected activities should address different cognitive levels.
Sasol-Inzalo Book 1 p 37 no. 10 and 12
DBE workbook 1 p 26 no. 1
Grade 8 Lesson Plan: 1+4 Intervention – Term 1
INTEGERS: Calculations with integers (Lesson 3)
(Draft)
Page 4 of 4