TERM: 1^{st} Term
WEEK: 4
CLASS: Primary 3
AGE: 8 years
DURATION: 5 periods of 40 minutes each
DATE:
SUBJECT: Mathematics
TOPIC: Addition and subtraction
SPECIFIC OBJECTIVES: At the end of the lesson, the pupils should be able to
INSTRUCTIONAL TECHNIQUES: Explanation, question and answer, demonstration, practical, assessments
INSTRUCTIONAL MATERIALS: Base 10 kit, 100 number board, scrap paper, videos from source https://www.youtube.com/watch?v=wWaP5wk8F1A
PERIOD 1: Addition and subtraction of multiples of 10
PRESENTATION  TEACHER’S ACTIVITY  PUPIL’S ACTIVITY 
STEP 1 MENTAL MATHS  The teacher begins the lesson with some mental calculations Calculate 1. 6 + ____ = 10 2. 3 + ____ = 10 3. 2 + ____ = 10 4. 1 + ____ = 10 5. 5 + ____ = 10 6. 5 + 6 = _____ 7. 9 + 5 = _____ 8. 4 + 8 = _____ 9. 13 – 6 = _____ 10. 16 – 7 = _____  Pupils respond and participate 
STEP 2 CONCEPT DEVELOPMENT  The teacher writes 40 + 80 = _______ on the board With the base 10 kits available, the pupils are asked to answer the questions individually. The learners who got the answers correctly are then asked to share the strategies they used in deriving their answers with the class
CLASS ACTIVITY The learners are asked to use the methods explained by the teacher to attempt these questions 1. 50 + 90 = _____ 2. 140 – 90 =_____ 3. 200 + 300 =_____ 4. 600 – 400 = _____
 Pupils pay attention and participate 
STEP 3 CLASSWORK  Using the place value table, calculate a. 20 + 90 = _____ b. 130 – 50 = ______ c. 200 + 600 = ______ d. 900 – 200 = ______ e. 60 + 70 = ______
 Pupils attempt their class work 
STEP 4 HOMEWORK  Using the place value table a. 40 + 90 = ______ b. 700 – 300 = ______  Pupils attempt their class work 
STEP 5 SUMMARY  The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value
She marks their class works, makes corrections where necessary and commends them positively 

PERIOD 2: mental maths addition
PRESENTATION  TEACHER’S ACTIVITY  PUPIL’S ACTIVITY 
STEP 1 MENTAL MATHS  The teacher begins the lesson with some mental calculations The pupils practice the number bonds of 10 1,9 2,8 3,7 4,6 5,5  Pupils respond and participate 
STEP 2 CONCEPT DEVELOPMENT  The teacher writes 13 + 7 = _____ on the board and asks the learners to solve it mentally. They also represent the addition using counters/place value table addition Which will give 1 ten and 10 ones which equals 20
The same process is repeated for 34 + 6 = _____ 58 + 2 = _____
CLASS ACTIVITY The learners work in pairs. One learner calls out any number form 11 to 20, while the other learner thinks about how many more is needed to make 20. For example if the first learner calls out 16, the second learner responds by saying 4 i.e. 16 + 4 = 20 Learners are asked to work out the answers mentally. Other number combinations like 12, 25 etc can also be tried
 Pupils pay attention and participate 
STEP 3 CLASSWORK  1 Fill in the missing numbers: a 15 + ( ) = 20 b 13 + ( ) = 20 c 17 + ( ) = 20 d 19 + ( ) = 20 e 16 + ( ) = 20
2 Solve the following: a 82 + 8 = b 55 + 5 = c 63 + 7 = d 46 + 4 = e 21 + 9 = f 74 + 6 = g 38 + 2 = h 57 + 3 =  Pupils attempt their class work 
STEP 4 HOMEWORK  Solve the following: a 41 + 9 = b 37 + 3 = c 28 + 2 = d 65 + 5 = e 84 + 6 =  The pupils writes it in their homework book 
STEP 5 SUMMARY  The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value
She marks the class work, makes corrections where necessary and commends the pupils positively


PERIOD 3: Mental maths Addition with carrying
PRESENTATION  TEACHER’S ACTIVITY  PUPIL’S ACTIVITY 
STEP 1 MENTAL MATHS  The teacher begins the lesson with some mental calculations The pupils practice the number bonds of 20 1,19 2,18 3,17 4,16 5,15 6,14 7,13 8,12 9,11 10,10  Pupils respond and participate 
STEP 2 CONCEPT DEVELOPMENT  The teacher writes 14 + 9 = _____ on the board. The teacher explains that there are three types of solution to the question a. counting all b. counting on c. makingaten using the place value table and bonds
Using bonds 14 + 9 = She asks herself what number can be added to 14 to make it 20 which is 6 She then breaks 9 into 6,3 So 14 + 6 = 20 and 20 + 3= 23 So 14 + 9 = 23
The same process is repeated with 37 + 5 = 63 + 8 =
CLASS ACTIVITY She writes 14 + 20 = _____ on the board and ask the learners to use bonds to answer the above question mentally The same process is repeated with 37 + 40 = 59 + 20 =  Pupils pay attention and participate 
STEP 3 CLASSWORK  1. Using bonds and blocks, solve these problems a. 27 + 5 = _____ b. 68 + 5 = _____ c. 55 + 7 = _____ d. 83 + 9 = _____ e. 18 + 4 = _____
2 Solve the problems: a 48 + 3 = b 19 + 7 = c 65 + 6 = d 75 + 8 = e 13 + 9 =
3 What do we get if we add: a 13 + 80 = b 51 + 20 =  Pupils attempt their class work 
STEP 4 HOMEWORK  Using blocks and bonds, solve these problems a. 54 + 7 = b. 29 + 5 = c. 63 + 9 = d. 42 + 9 =
 The pupils writes it in their homework book 
STEP 5 SUMMARY  The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value
She marks the class work, make corrections where necessary and commends the pupils positively


PERIOD 4: Mental maths subtraction
PRESENTATION  TEACHER’S ACTIVITY  PUPIL’S ACTIVITY 
STEP 1 MENTAL MATHS  The teacher begins the lesson with some mental calculations The pupils practice the number bonds by saying numbers 10 to 19 randomly and learners answer what you need to add to make it 20  Pupils respond and participate 
STEP 2 CONCEPT DEVELOPMENT  The teacher writes 30 3 = ____ on the board. Pupils are encouraged to solve the question mentally Then for those who got it correctly, they are asked to share their strategies with the class
The steps are repeated with 60 – 7 = 80 – 9 =
CLASS ACTIVITY The teacher writes 259= ____ on the board. Using the makeaten method explains that 259 is broken into 10+ 10  9 + 5
Then 10 + 10 = 20 209 = 11 11 + 5 = 16  Pupils pay attention and participate 
STEP 3 CLASSWORK  1 Fill in the missing numbers: a 20 is 13 and b 20 is 19 and c 20 is 12 and d 20 is 16 and e 20 is 15 and
2 Solve the following: a 20 – 7 = b 70 – 5 = c 40 – 1 = d 30 – 8 = e 60 – 6 = f 80 – 9 = g 50 – 3 = h 90 – 2 =  Pupils attempt their class work 
STEP 4 HOMEWORK  Using blocks and bonds, solve these problems 1 Solve the following: a 30 – 1 = b 70 – 8 = c 20 – 5 = d 90 – 3 = e 60 – 4 =  The pupils writes it in their homework book 
STEP 5 SUMMARY  The teacher summarizes by ensuring the pupils solve the problems mentally and give assistance where necessary. The teacher also ensures their solid understanding of place value
She marks the class work, make corrections where necessary and commends the pupils positively


PERIOD 5: Weekly Test/consolidations
TEACHER’S ACTIVITY: The teacher revises all the concepts treated from period 14 and gives the pupils follow through exercises, quiz and tests . She marks the exercises, makes corrections and commends the pupils positively.
PUPIL’S ACTIVITY: The pupils work on the worksheets and exercises given by the teacher individually
ASSESSMENT
1 Solve the problems:
a 57 + 5 =
b 39 + 3 =
c 65 + 8 =
d 46 + 7 =
e 57 + 4 =
f 79 + 4 =
g 32 + 9 =
h 83 + 8 =
2 Fill in the missing numbers:
a 55 + ____ = 60
b 37 + ____ = 40
c 41 + ____ = 50
3 Solve the following:
a 53 + ____ = 60
b 42 + 8 =
c 27 + ____ = 30
d 88 + 2 =
4 Fill in the missing numbers:
a 20 is 14 and
b 30 is 29 and
c 40 is 32 and
5 Solve the following:
a 40 – 6 =
b 80 – 5 =
c 20 – 9 =
d 60 – 7 =
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