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Mathematics
Form 3 2025
TERM II
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1 5
Approximations and Errors
Computing using calculators
Computing using calculators
By the end of the lesson, the learner should be able to:
Solve basic operations using calculators
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 24-26
1 6
Approximations and Errors
Approximation
Estimation
By the end of the lesson, the learner should be able to:
Approximate values by rounding off
Approximate values by truncation
Approximate values by estimation
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 29-30
1 7
Approximations and Errors
Accuracy and errors
Percentage error
By the end of the lesson, the learner should be able to:
Find the absolute error
Find the relative error
Find the percentage error of a given value
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 31-32
2 1
Approximations and Errors
Rounding off error and truncation error
By the end of the lesson, the learner should be able to:

Find the rounding off error
Find the truncation error
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 34
2 2
Approximations and Errors
Propagation of errors
Propagation of errors
By the end of the lesson, the learner should be able to:
Find the propagation of errors in addition and subtraction
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 35-36
2 3
Approximations and Errors
Propagation of errors
Propagation of errors
By the end of the lesson, the learner should be able to:
Find the propagation of errors in multiplication
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 36-37
2 4
Approximations and Errors
Propagation of errors
Propagation of errors
By the end of the lesson, the learner should be able to:
Find the propagation of errors in division
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 37-38
2 5
Approximations and Errors
Word problems
By the end of the lesson, the learner should be able to:

Find the propagation of errors of a word problem
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 39-40
2 6
Trigonometry (II)
The unit circle
The unit circle
By the end of the lesson, the learner should be able to:
Draw the unit circle
Solve problems using the unit circle
Discussions
Solving
Demonstrating
Explaining
Calculators
Protractor
Ruler
Pair of compasses
KLB Mathematics
Book Three
Pg 41-42
2 7
Trigonometry (II)
Trigonometric ratios of angles greater than 900
Trigonometric ratios of angles greater than 900
By the end of the lesson, the learner should be able to:
Find the trigonometric values of angles
Discussions
Solving
Demonstrating
Explaining
Calculators
Protractor
Ruler
Pair of compasses
Calculators 
KLB Mathematics
Book Three
Pg 44-45
3 1
Trigonometry (II)
Trigonometric ratios of negative angles
Trigonometric ratios of angles greater than 3600
By the end of the lesson, the learner should be able to:
Find the trigonometric values of negative angles
Find the trigonometric values of angles greater than 3600
Discussions
Solving
Demonstrating
Explaining
geo boards & graph books
KLB Mathematics
Book Three
Pg 48-49
3 2
Trigonometry (II)
Use of mathematical tables
By the end of the lesson, the learner should be able to:

Use mathematical tables to find sine and cosine
Discussions
Solving
Demonstrating
Explaining
mathematical tables
KLB Mathematics
Book Three
Pg 51-55
3 3
Trigonometry (II)
Use of mathematical tables
Use of calculators
By the end of the lesson, the learner should be able to:
Use mathematical tables to find tan
Use calculators to find sine, cosine and tan
Discussions
Solving
Demonstrating
Explaining
mathematical tables
calculators
KLB Mathematics
Book Three
Pg 55-56
3 4
Trigonometry (II)
Radian measure
Simple trigonometric graphs
By the end of the lesson, the learner should be able to:
Convert degrees to radians and vice versa
Draw tables for sine of values
Draw graphs of sine functions
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 58-61
3 5
Trigonometry (II)
Graphs of cosines
Graphs of tan
By the end of the lesson, the learner should be able to:
Draw tables for cosine of values
Draw graphs of cosine functions
Draw tables for tan of values
Draw graphs of tan functions
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 63-64
3 6
Trigonometry (II)
The sine rule
By the end of the lesson, the learner should be able to:

State the sine rule
Use sine rule to find solution of triangles
Discussions
Solving
Demonstrating
Explaining
Calculators                                                       
KLB Mathematics
Book Three
Pg 65-70
3 7
Trigonometry (II)
Cosine rule
Problem solving
By the end of the lesson, the learner should be able to:
State the sine rule
Use sine rule to find solution of triangles
Solve problems on cosines, sines and tan
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 71-75
4 1
Surds
Rational and irrational numbers
Surds
By the end of the lesson, the learner should be able to:
Classify numbers as rational and irrational numbers
State the order of surds
Simplify surds
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 78
4 2
Surds
Addition of surds
Subtraction of surds
By the end of the lesson, the learner should be able to:
Add surds
Subtract surds
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 79-80
4 3
Surds
Multiplication of surds
By the end of the lesson, the learner should be able to:

Multiply surds
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 80-82
4 4
Surds
Division of surds
Rationalizing the denominator
By the end of the lesson, the learner should be able to:
Divide surds
Rationalize the denominator
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 81-82
4 5
Surds
Further Logarithms
Solving problem
Introduction
By the end of the lesson, the learner should be able to:
Solve problems on surds
Use calculators to find the logarithm of numbers
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 87-88
4 6
Further Logarithms
Laws of logarithms
Laws of logarithms
By the end of the lesson, the learner should be able to:
State the laws of logarithms
Use laws of logarithms to solve problems
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 90-93
4 7
Further Logarithms
Logarithmic equations and expressions
By the end of the lesson, the learner should be able to:

Solve the logarithmic equations and expressions
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 93-95
5 1
Further Logarithms
Logarithmic equations and expressions
Further computation using logarithms
By the end of the lesson, the learner should be able to:
Solve the logarithmic equations and expressions
Solve problems involving logarithms
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 93-95
5 2
Further Logarithms
Further computation using logarithms
Further computation using logarithms
By the end of the lesson, the learner should be able to:
Solve problems involving logarithms
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 95-96
5 3
Further Logarithms
Problem solving
Problem solving
By the end of the lesson, the learner should be able to:
Solve problems involving logarithms
Discussions
Solving
Demonstrating
Explaining
Discussions Solving
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 97
5 4
Commercial arithmetic
Simple interest
By the end of the lesson, the learner should be able to:

Calculate simple interest
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 98-99
5 5
Commercial arithmetic
Compound interest
Appreciation
By the end of the lesson, the learner should be able to:
Calculate the compound interest
Calculate the appreciation value of items
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 102-106
5 6
Commercial arithmetic
Depreciation
Hire purchase
By the end of the lesson, the learner should be able to:
Calculate the depreciation value of items
Find the hire purchase
Discussions
Solving
Demonstrating
Explaining
Calculators 
 ,calculator
KLB Mathematics
Book Three
Pg 109
5 7
Commercial arithmetic
Income tax
P.A.Y.E
By the end of the lesson, the learner should be able to:
Calculate the income tax
Calculate the p.a.y.e
Discussions
Solving
Demonstrating
Explaining
income tax table ,calculator
Calculators s
KLB Mathematics
Book Three
Pg 112-114
6 1
Matrices
Matrix representation and order of matrix
By the end of the lesson, the learner should be able to:

Represent matrix
State the order of a matrix
Discussions
Solving
Demonstrating
Explaining
Chart showing tabular data
KLB Mathematics
Book Three
Pg 168-170
6 2
Matrices
Addition of matrix
Subtraction of matrices
By the end of the lesson, the learner should be able to:
Add matrices
Subtract matrices
Discussions
Solving
Demonstrating
Explaining
Chart showing tabular data
KLB Mathematics
Book Three
Pg 170
6 3
Matrices
Combined addition and subtraction of matrices
Matrix multiplication
By the end of the lesson, the learner should be able to:
Perform the combined operation on matrices
Multiply matrices
Discussions
Solving
Demonstrating
Explaining
Chart showing tabular data
KLB Mathematics
Book Three
Pg 171-174
6 4
Matrices
Matrix multiplication
Identity matrix
By the end of the lesson, the learner should be able to:
Multiply matrices
Find the identity matrix
Discussions
Solving
Demonstrating
Explaining
Chart showing tabular data
KLB Mathematics
Book Three
Pg 176-179
6 5
Matrices
Determinant of a 2
Inverse of a 2
By the end of the lesson, the learner should be able to:
Find the determinant of a 2
Calculate the inverse of a 2
Discussions
Solving
Demonstrating
Explaining
Calculator
KLB Mathematics
Book Three
Pg 183
6 6
Matrices
Inverse of a 2
By the end of the lesson, the learner should be able to:

Calculate the inverse of a 2
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 186-187
6 7
Matrices
Solutions of simultaneous equations by matrix method
Solutions of simultaneous equations by matrix method
By the end of the lesson, the learner should be able to:
Solve simultaneous equations by matrix method
Discussions
Solving
Demonstrating
Explaining
Calculators 
KLB Mathematics
Book Three
Pg 188-190
7 1
Matrices
Circles: Chords and tangents
Problem solving
Length of an arc
By the end of the lesson, the learner should be able to:
Calculate the inverse of a matrix
Solve simultaneous equations by matrix method
Calculate the length of an arc
Discussions
Solving
Demonstrating
Explaining
Calculators 
Geometrical set,calculator
KLB Mathematics
Book Three
Pg 190
7 2
Circles: Chords and tangents
Chords
Parallel chords
By the end of the lesson, the learner should be able to:
Calculate the length of a chord
Calculate the perpendicular bisector
Find the value of parallel chords
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 126-128
7 3
Circles: Chords and tangents
Equal chords
By the end of the lesson, the learner should be able to:

Find the length of equal chords
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 131-132
7 4
Circles: Chords and tangents
Intersecting chords
Intersecting chords
By the end of the lesson, the learner should be able to:
Calculate the length of intersecting chords
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 132-135
7 5
Circles: Chords and tangents
Tangent to a circle
Tangent to a circle
By the end of the lesson, the learner should be able to:
Construct a tangent to a circle
Calculate the length of tangent
Calculate the angle between tangents
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 139-140
7 6
Circles: Chords and tangents
Properties of tangents to a circle from an external point
Tangents to two circles
By the end of the lesson, the learner should be able to:
State the properties of tangents to a circle from an external point
Calculate the tangents of direct common tangents
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 142-144
7 7
Circles: Chords and tangents
Tangents to two circles
By the end of the lesson, the learner should be able to:

Calculate the tangents of transverse common tangents
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 150-151
8-10

Midterm exam

10 2
Circles: Chords and tangents
Contact of circles
Contact of circles
By the end of the lesson, the learner should be able to:
Calculate the radii of contact circles
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 151-153
10 3
Circles: Chords and tangents
Problem solving
Angle in alternate segment
By the end of the lesson, the learner should be able to:
Solve problems involving chords, tangents and contact circles
Calculate the angles in alternate segments
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 154-157
10 4
Circles: Chords and tangents
Angle in alternate segment
Circumscribed circle
By the end of the lesson, the learner should be able to:
Calculate the angles in alternate segments
Construct circumscribed circles
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 160-161
10 5
Circles: Chords and tangents
Escribed circles
By the end of the lesson, the learner should be able to:

Construct escribed circles
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 165-166
10 6
Circles: Chords and tangents
Centroid
Orthocenter
By the end of the lesson, the learner should be able to:
Construct centroid
Construct orthocenter
Discussions
Solving
Demonstrating
Explaining
Geometrical set ,calculator
KLB Mathematics
Book Three
Pg 166
10 7
Sequences and series
Sequences
Arithmetic sequences
By the end of the lesson, the learner should be able to:
Find the next terms
Find the nth term of a given arithmetic sequence
Discussions
Solving
Demonstrating
Explaining
KLB Mathematics
Book Three
Pg 207-208
11 1
Sequences and series
Geometric sequence
Arithmetic series
By the end of the lesson, the learner should be able to:
Find the nth term of a given geometric sequence
Find the nth term of a given arithmetic series
Discussions
Solving
Demonstrating
Explaining
KLB Mathematics
Book Three
Pg 211-213
11 2
Sequences and series
Geometric series
By the end of the lesson, the learner should be able to:

Find the nth term of a given geometric series
Discussions
Solving
Demonstrating
Explaining
KLB Mathematics
Book Three
Pg 216-219
11 3
Sequences and series
Vectors II
Geometric series
Coordinates in two dimensions
By the end of the lesson, the learner should be able to:
Find the nth term of a given geometric series
Identify the coordinates of appoint in two dimensions
Discussions
Solving
Demonstrating
Explaining
Wire mesh in 3 dimensions
KLB Mathematics
Book Three
Pg 216-219
11 4
Vectors II
Coordinates in three dimensions
Column vectors
By the end of the lesson, the learner should be able to:
Identify the coordinates of appoint in three dimensions
Find a displacement and represent it in column vector
Discussions
Solving
Demonstrating
Explaining
Wire mesh in 3 dimensions
KLB Mathematics
Book Three
Pg 222
11 5
Vectors II
Position vector
Unit vectors
By the end of the lesson, the learner should be able to:
Calculate the position vector
Express vectors in terms of unit vectors
Discussions
Solving
Demonstrating
Explaining
KLB Mathematics
Book Three
Pg 224
11 6
Vectors II
Unit vectors
By the end of the lesson, the learner should be able to:

Express vectors in terms of unit vectors
Discussions
Solving
Demonstrating
Explaining
KLB Mathematics
Book Three
Pg 226-228
11 7
Vectors II
Magnitude of a vector in three dimensions
Parallel vectors
By the end of the lesson, the learner should be able to:
Calculate the magnitude of a vector in three dimensions
Identify parallel vectors
Discussions
Solving
Demonstrating
Explaining
calculators
Geoboard
KLB Mathematics
Book Three
Pg 229-230
12 1
Vectors II
Collinear points
Collinear points
By the end of the lesson, the learner should be able to:
Show that points are collinear
Discussions
Solving
Demonstrating
Explaining
Geoboard
KLB Mathematics
Book Three
Pg 232
12 2
Vectors II
Proportion division of a line
Proportion division of a line
By the end of the lesson, the learner should be able to:
Divide a line internally in the given ratio
Divide a line externally in the given ratio
Discussions
Solving
Demonstrating
Explaining
Geoboard, calculators
KLB Mathematics
Book Three
Pg 237-238
12 3
Vectors II
Proportion division of a line
By the end of the lesson, the learner should be able to:

Divide a line internally and externally in the given ratio
Discussions
Solving
Demonstrating
Explaining
Geoboard, calculators
KLB Mathematics
Book Three
Pg 239
12 4
Vectors II
Ratio theorem
Ratio theorem
By the end of the lesson, the learner should be able to:
Express position vectors
Find the position vector
Discussions
Solving
Demonstrating
Explaining
Geoboard, calculators
KLB Mathematics
Book Three
Pg 240
12 5
Vectors II
Mid-point
Ratio theorem
By the end of the lesson, the learner should be able to:
Find the mid-points of the given vectors
Use ratio theorem to find the given vectors
Discussions
Solving
Demonstrating
Explaining
Geoboard, calculators
KLB Mathematics
Book Three
Pg 243
12 6
Vectors II
Ratio theorem
Applications of vectors
By the end of the lesson, the learner should be able to:
Use ratio theorem to find the given vectors
Use vectors to show the diagonals of a parallelogram
Discussions
Solving
Demonstrating
Explaining
Geoboard, calculators
KLB Mathematics
Book Three
Pg 246-248
12 7
Vectors II
Applications of vectors
By the end of the lesson, the learner should be able to:

Use vectors to show the diagonals of a rectangle
Discussions
Solving
Demonstrating
Explaining
Geoboard, calculators
KLB Mathematics
Book Three
Pg

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