Numbers

Integers - Addition of positive integers to positive integers

By the end of the lesson, the learner should be able to:

- Define integers and identify positive integers
- Add positive integers to positive integers
- Show interest in learning about integers

- Use number cards with positive signs to demonstrate addition of integers
- Draw tables and arrange cards to work out addition
- Discuss real-life scenarios involving addition of positive integers
- Use counters to visualize addition operations

How do we add positive integers in real-life situations?

- Master Mathematics Grade 9 pg. 1
- Number cards
- Counters with positive signs
- Charts
- Number lines

- Observation - Oral questions - Written assignments

Numbers

Integers - Addition of negative integers to negative integers
Integers - Addition of negative to positive integers and subtraction of integers
Integers - Multiplication and division of integers
Integers - Combined operations on integers and applications

By the end of the lesson, the learner should be able to:

- Identify negative integers
- Add negative integers to negative integers
- Appreciate the use of negative integers in daily life

- Use number cards with negative signs to demonstrate addition
- Arrange cards in rows to show addition of negative integers
- Discuss real-life applications involving temperature and borrowing money
- Use number lines to visualize operations

How do we represent and add negative numbers in everyday situations?

- Master Mathematics Grade 9 pg. 1
- Number cards with negative signs
- Number lines
- Thermometers
- Charts
- Counters
- Digital devices
- Internet access
- Drawing materials
- Charts showing triangles
- Number cards
- Reference books

- Observation - Oral questions - Written tests

Numbers

Cubes and Cube Roots - Cubes of numbers by multiplication
Cubes and Cube Roots - Cubes of numbers from mathematical tables
Cubes and Cube Roots - Cube roots by factor method
Cubes and Cube Roots - Cube roots from mathematical tables

By the end of the lesson, the learner should be able to:

- Define the cube of a number
- Work out cubes of whole numbers, decimals and fractions by multiplication
- Show interest in finding cubes of numbers

- Use stacks of dice to demonstrate the concept of cubes
- Count dice representing length, width, and height
- Multiply numbers three times to find cubes
- Work out cubes of mixed numbers and fractions

How do we work out the cubes of numbers?

- Master Mathematics Grade 9 pg. 12
- Dice or cubes
- Number cards
- Charts
- Drawing materials
- Mathematical tables
- Calculators
- Charts showing sample tables
- Factor trees diagrams
- Reference books

- Observation - Oral questions - Written tests

Numbers

Cubes and Cube Roots - Using calculators and real-life applications
Indices and Logarithms - Expressing numbers in index form

By the end of the lesson, the learner should be able to:

- Identify calculator functions for cubes and cube roots
- Use calculators to find cubes and cube roots
- Show confidence in using digital tools

- Key in numbers and use x³ function on calculators
- Use shift and ∛ functions to find cube roots
- Solve problems involving cubic boxes, tanks, and containers
- Calculate lengths of cubes from given volumes

Where do we apply cubes and cube roots in real-life situations?

- Master Mathematics Grade 9 pg. 12
- Calculators
- Digital devices
- Models of cubes
- Internet access
- Master Mathematics Grade 9 pg. 24
- Number cards
- Factor tree charts
- Drawing materials

- Observation - Oral questions - Written tests - Project work

Numbers

Indices and Logarithms - Multiplication and division laws of indices

By the end of the lesson, the learner should be able to:

- State the multiplication and division laws of indices
- Apply the laws to simplify expressions
- Show interest in working with indices

- Use number cards to demonstrate multiplication of indices
- Write numbers in expanded form then in index form
- Discover that when multiplying, indices are added
- Use cards to show that when dividing, indices are subtracted

What are the laws of indices?

- Master Mathematics Grade 9 pg. 24
- Number cards
- Charts
- Mathematical tables

- Observation - Oral questions - Written tests

Numbers

Indices and Logarithms - Power law and zero indices
Indices and Logarithms - Negative and fractional indices

By the end of the lesson, the learner should be able to:

- Explain the power law for indices
- Apply the power law and zero indices to simplify expressions
- Appreciate the patterns in indices

- Work with indices in brackets and multiply the powers
- Use factor method and division law to discover zero indices
- Use calculators to verify that any number to power zero equals 1
- Simplify expressions combining different laws

Why does any number to power zero equal one?

- Master Mathematics Grade 9 pg. 24
- Calculators
- Charts
- Reference books
- Mathematical tables

- Observation - Oral questions - Written assignments

Numbers

Indices and Logarithms - Applications of laws of indices
Indices and Logarithms - Powers of 10 and common logarithms

By the end of the lesson, the learner should be able to:

- Identify equations involving indices
- Solve equations and simultaneous equations with indices
- Appreciate the importance of indices

- Solve for unknowns by equating indices
- Work out simultaneous equations involving indices
- Discuss real-life applications of indices
- Use IT devices to explore more on indices

How do we use indices to solve equations?

- Master Mathematics Grade 9 pg. 24
- Digital devices
- Internet access
- Mathematical tables
- Reference books
- Charts

- Observation - Oral questions - Written assignments

Numbers

Compound Proportions and Rates of Work - Dividing quantities into proportional parts
Compound Proportions and Rates of Work - Dividing quantities into proportional parts (continued)

By the end of the lesson, the learner should be able to:

- Define proportion and proportional parts
- Divide quantities into proportional parts accurately
- Appreciate fair sharing of resources

- Discuss the concept of proportion and proportional parts
- Calculate total number of proportional parts
- Share quantities in given ratios
- Solve problems involving sharing profits, land, and resources

What are proportions and how do we share quantities fairly?

- Master Mathematics Grade 9 pg. 33
- Number cards
- Charts
- Reference materials
- Calculators
- Real objects for sharing

- Observation - Oral questions - Written assignments

Numbers

Compound Proportions and Rates of Work - Relating different ratios
Compound Proportions and Rates of Work - Continuous proportion

By the end of the lesson, the learner should be able to:

- Identify when ratios are related
- Relate two or more ratios accurately
- Appreciate the connections between ratios

- Draw number lines to show proportional relationships
- Find distances and relate ratios on number lines
- Identify when numbers are in proportion
- Use cross multiplication to solve proportions

How do we determine if ratios are related?

- Master Mathematics Grade 9 pg. 33
- Number lines
- Drawing materials
- Charts
- Reference books
- Number cards
- Calculators

- Observation - Oral questions - Written assignments

Numbers

Compound Proportions and Rates of Work - Working out compound proportions using ratio method
Compound Proportions and Rates of Work - Compound proportions (continued)

By the end of the lesson, the learner should be able to:

- Define compound proportion
- Work out compound proportions using the ratio method
- Appreciate proportional relationships

- Measure heights in pictures and compare ratios
- Observe that in compound proportion, quantities change in the same ratio
- Set up and solve proportion equations
- Relate actual measurements to scaled measurements

How do we use ratios to solve compound proportion problems?

- Master Mathematics Grade 9 pg. 33
- Pictures and photos
- Measuring tools
- Charts
- Rectangles and shapes
- Calculators
- Reference materials

- Observation - Oral questions - Written assignments

Numbers

Compound Proportions and Rates of Work - Introduction to rates of work
Compound Proportions and Rates of Work - Calculating rates of work with two variables

By the end of the lesson, the learner should be able to:

- Define rate of work
- Relate number of workers to time taken
- Appreciate efficient work planning

- Rearrange classroom desks in groups and time the activity
- Compare time taken by different sized groups
- Understand that more workers take less time
- Set up rate of work problems in table format

Why do more workers complete work faster?

- Master Mathematics Grade 9 pg. 33
- Stopwatch or timer
- Classroom furniture
- Charts
- Charts showing worker-day relationships
- Calculators
- Reference books

- Observation - Oral questions - Written assignments

Numbers

Compound Proportions and Rates of Work - Rates of work with three variables

By the end of the lesson, the learner should be able to:

- Explain rate of work with multiple variables
- Apply both increasing and decreasing ratios in one problem
- Show analytical thinking skills

- Set up problems with three variables in table format
- Compare each pair of variables to determine ratio type
- Solve factory, painting, and packing problems
- Multiply ratios to get final answers

How do we solve rate of work problems with multiple variables?

- Master Mathematics Grade 9 pg. 33
- Charts
- Calculators
- Real-world work scenarios

- Observation - Oral questions - Written assignments

Numbers

Compound Proportions and Rates of Work - More rate of work problems
Compound Proportions and Rates of Work - Applications of rates of work

By the end of the lesson, the learner should be able to:

- Identify different types of rate problems
- Determine resources needed for various tasks
- Appreciate practical applications of mathematics

- Calculate tractors needed for field cultivation
- Determine teachers required for lesson allocation
- Work out lorries needed for transportation
- Solve water pump flow rate problems

How do we apply rates of work to different real-life situations?

- Master Mathematics Grade 9 pg. 33
- Calculators
- Charts showing different scenarios
- Reference materials
- Digital devices
- Charts
- Reference books

- Observation - Oral questions - Written tests

Numbers
Algebra

Compound Proportions and Rates of Work - Using IT and comprehensive applications
Matrices - Identifying a matrix

By the end of the lesson, the learner should be able to:

- Identify IT tools for solving rate problems
- Use IT devices to work on rates of work
- Appreciate the use of compound proportions and rates in real life

- Use digital devices to solve rate problems
- Play creative games on rates and proportions
- Review and consolidate all concepts covered
- Discuss careers involving proportions and rates

How do we use technology to solve compound proportion and rate problems?

- Master Mathematics Grade 9 pg. 33
- Digital devices
- Internet access
- Educational games
- Reference materials
- Master Mathematics Grade 9 pg. 42
- Charts showing matrices
- Calendar samples
- Tables and schedules

- Observation - Oral questions - Written tests - Project work

Algebra

Matrices - Determining the order of a matrix
Matrices - Determining the position of items in a matrix

By the end of the lesson, the learner should be able to:

- Define the order of a matrix
- Determine the order of matrices in different situations
- Appreciate the use of matrix notation

- Study parking lot arrangements to determine rows and columns
- Count rows and columns in given matrices
- Write the order of matrices in the form m × n
- Identify row, column, rectangular and square matrices

What is the order of a matrix?

- Master Mathematics Grade 9 pg. 42
- Mathematical tables
- Charts showing different matrix types
- Digital devices
- Classroom seating charts
- Calendar samples
- Football league tables

- Observation - Oral questions - Written tests

Algebra

Matrices - Position of items and equal matrices
Matrices - Determining compatibility for addition and subtraction

By the end of the lesson, the learner should be able to:

- Identify corresponding elements in equal matrices
- Determine values of unknowns in equal matrices
- Appreciate the concept of matrix equality

- Compare elements in matrices with same positions
- Find values of letters in equal matrices
- Study egg trays and other matrix arrangements
- Work out values by equating corresponding elements

How do we compare elements in different matrices?

- Master Mathematics Grade 9 pg. 42
- Number cards
- Matrix charts
- Real objects arranged in matrices
- Charts showing matrix orders
- Classroom arrangement diagrams
- Reference materials

- Observation - Oral questions - Written tests

Algebra

Matrices - Addition of matrices
Matrices - Subtraction of matrices

By the end of the lesson, the learner should be able to:

- Explain the process of adding matrices
- Add compatible matrices accurately
- Show systematic approach to matrix addition

- Identify elements in corresponding positions
- Add matrices by adding corresponding elements
- Work out matrix addition problems
- Verify that resultant matrix has same order as original matrices

How do we add matrices?

- Master Mathematics Grade 9 pg. 42
- Number cards with matrices
- Charts
- Calculators
- Number cards
- Matrix charts
- Reference books

- Observation - Oral questions - Written tests

Algebra

Matrices - Combined operations and applications
Equations of a Straight Line - Identifying the gradient in real life

By the end of the lesson, the learner should be able to:

- Identify combined operations on matrices
- Perform combined addition and subtraction of matrices
- Appreciate applications of matrices in real life

- Work out expressions like A + B - C and A - (B + C)
- Apply matrices to basketball scores, shop sales, and stock records
- Solve real-life problems using matrix operations
- Visit supermarkets to observe item arrangements

How do we use matrices to solve real-life problems?

- Master Mathematics Grade 9 pg. 42
- Digital devices
- Real-world data tables
- Reference materials
- Master Mathematics Grade 9 pg. 57
- Pictures showing slopes
- Internet access
- Charts

- Observation - Oral questions - Written tests - Project work

Algebra

Equations of a Straight Line - Gradient as ratio of rise to run

By the end of the lesson, the learner should be able to:

- Define rise and run in relation to gradient
- Calculate gradient as ratio of vertical to horizontal distance
- Show understanding of positive and negative gradients

- Identify vertical distance (rise) and horizontal distance (run)
- Work out gradient using the formula gradient = rise/run
- Use adjustable ladders to demonstrate different gradients
- Complete tables showing different ladder positions

How do we calculate the slope or gradient?

- Master Mathematics Grade 9 pg. 57
- Ladders or models
- Measuring tools
- Charts
- Reference books

- Observation - Oral questions - Written tests

Algebra

Equations of a Straight Line - Determining gradient from two known points
Equations of a Straight Line - Types of gradients

By the end of the lesson, the learner should be able to:

- State the formula for gradient from two points
- Determine gradient from two known points on a line
- Appreciate the importance of coordinates

- Plot points on a Cartesian plane
- Count squares to find vertical and horizontal distances
- Use the formula m = (y₂ - y₁)/(x₂ - x₁)
- Work out gradients from given coordinates

How do we find the gradient when given two points?

- Master Mathematics Grade 9 pg. 57
- Graph paper
- Rulers
- Plotting tools
- Digital devices
- Charts showing gradient types
- Internet access

- Observation - Oral questions - Written assignments

Algebra

Equations of a Straight Line - Equation given two points
Equations of a Straight Line - More practice on equations from two points

By the end of the lesson, the learner should be able to:

- Explain the steps to find equation from two points
- Determine the equation of a line given two points
- Show systematic approach to problem solving

- Calculate gradient using two given points
- Use a general point (x, y) with one of the given points
- Equate the two gradient expressions
- Simplify to get the equation of the line

How do we find the equation of a line from two points?

- Master Mathematics Grade 9 pg. 57
- Graph paper
- Number cards
- Charts
- Reference books
- Plotting tools
- Geometric shapes
- Calculators

- Observation - Oral questions - Written assignments

Algebra

Equations of a Straight Line - Equation from a point and gradient
Equations of a Straight Line - Applications of point-gradient method

By the end of the lesson, the learner should be able to:

- Explain the method for finding equation from point and gradient
- Determine equation given a point and gradient
- Show confidence in using the gradient formula

- Use a given point and a general point (x, y)
- Write expression for gradient using the two points
- Equate the expression to the given gradient value
- Simplify to obtain the equation

How do we find the equation when given a point and gradient?

- Master Mathematics Grade 9 pg. 57
- Number cards
- Graph paper
- Charts
- Reference materials
- Calculators
- Geometric shapes
- Reference books

- Observation - Oral questions - Written assignments

Algebra

Equations of a Straight Line - Expressing in the form y = mx + c
Equations of a Straight Line - More practice on y = mx + c form

By the end of the lesson, the learner should be able to:

- Define the standard form y = mx + c
- Express linear equations in the form y = mx + c
- Show understanding of equation transformation

- Identify the term with y in given equations
- Take all other terms to the right hand side
- Divide by the coefficient of y to make it equal to 1
- Rewrite equations in standard form

How do we write equations in the form y = mx + c?

- Master Mathematics Grade 9 pg. 57
- Number cards
- Charts
- Calculators
- Reference materials
- Graph paper
- Reference books

- Observation - Oral questions - Written assignments

Algebra

Equations of a Straight Line - Interpreting y = mx + c
Equations of a Straight Line - Finding gradient and y-intercept from equations

By the end of the lesson, the learner should be able to:

- Define m and c in the equation y = mx + c
- Interpret the values of m and c from equations
- Show understanding of gradient and y-intercept

- Draw lines on graph paper and work out their gradients
- Determine equations and express in y = mx + c form
- Compare coefficient of x with calculated gradient
- Identify the y-intercept as the constant c

What do m and c represent in the equation y = mx + c?

- Master Mathematics Grade 9 pg. 57
- Graph paper
- Plotting tools
- Charts
- Digital devices
- Charts with tables
- Calculators
- Reference materials

- Observation - Oral questions - Written assignments

Algebra

Equations of a Straight Line - Determining x-intercepts
Equations of a Straight Line - Determining y-intercepts

By the end of the lesson, the learner should be able to:

- Define x-intercept of a line
- Determine x-intercepts from equations
- Show understanding that y = 0 at x-intercept

- Observe where lines cross the x-axis on graphs
- Note that y-coordinate is 0 at x-intercept
- Substitute y = 0 in equations to find x-intercept
- Work out x-intercepts from various equations

What is the x-intercept and how do we find it?

- Master Mathematics Grade 9 pg. 57
- Graph paper
- Plotting tools
- Charts
- Reference books
- Calculators

- Observation - Oral questions - Written assignments

Algebra

Equations of a Straight Line - Finding equations from intercepts
Linear Inequalities - Solving linear inequalities in one unknown

By the end of the lesson, the learner should be able to:

- Explain how to find equations from x and y intercepts
- Determine equations given both intercepts
- Appreciate the use of intercepts as two points

- Use x-intercept and y-intercept as two points on the line
- Write coordinates as (x-intercept, 0) and (0, y-intercept)
- Calculate gradient from these two points
- Use point-gradient method to find equation

How do we find the equation from the intercepts?

- Master Mathematics Grade 9 pg. 57
- Graph paper
- Number cards
- Charts
- Reference materials
- Master Mathematics Grade 9 pg. 72
- Number lines
- Reference books

- Observation - Oral questions - Written assignments

Algebra

Linear Inequalities - Multiplication and division by negative numbers

By the end of the lesson, the learner should be able to:

- Explain the effect of multiplying/dividing by negative numbers
- Solve inequalities involving multiplication and division
- Appreciate that inequality sign reverses with negative operations

- Solve inequalities and test with integer substitution
- Observe that inequality sign reverses when multiplying/dividing by negative
- Compare solutions with and without sign reversal
- Work out various inequality problems

What happens to the inequality sign when we multiply or divide by a negative number?

- Master Mathematics Grade 9 pg. 72
- Number lines
- Number cards
- Charts
- Calculators

- Observation - Oral questions - Written assignments

Algebra

Linear Inequalities - Graphical representation in one unknown
Linear Inequalities - Linear inequalities in two unknowns

By the end of the lesson, the learner should be able to:

- Explain how to represent inequalities graphically
- Represent linear inequalities in one unknown on graphs
- Show understanding of continuous and dotted lines

- Change inequality to equation by replacing inequality sign
- Draw boundary line (continuous for ≤ or ≥, dotted for < or >)
- Choose test points to identify wanted and unwanted regions
- Shade the unwanted region

How do we represent inequalities on a graph?

- Master Mathematics Grade 9 pg. 72
- Graph paper
- Rulers
- Plotting tools
- Charts
- Tables for values
- Calculators

- Observation - Oral questions - Written tests

Algebra

Linear Inequalities - Graphical representation in two unknowns
Linear Inequalities - Applications to real-life situations

By the end of the lesson, the learner should be able to:

- Explain the steps for graphing two-variable inequalities
- Represent linear inequalities in two unknowns graphically
- Show accuracy in identifying solution regions

- Draw graphs for inequalities like 3x + 5y ≤ 15
- Use continuous or dotted lines appropriately
- Select test points to verify wanted region
- Shade unwanted regions correctly

How do we represent two-variable inequalities on graphs?

- Master Mathematics Grade 9 pg. 72
- Graph paper
- Rulers and plotting tools
- Digital devices
- Reference materials
- Real-world scenarios
- Charts

- Observation - Oral questions - Written tests

Measurements

Area - Area of a pentagon
Area - Area of a hexagon

By the end of the lesson, the learner should be able to:

- Define a regular pentagon
- Draw a regular pentagon and divide it into triangles
- Calculate the area of a regular pentagon

- Draw a regular pentagon of sides 4 cm using protractor (108° angles)
- Join vertices to the centre to form triangles
- Determine the height of one triangle
- Calculate area of one triangle then multiply by number of triangles
- Use alternative formula: ½ × perimeter × perpendicular height

How do we find the area of a pentagon?

- Master Mathematics Grade 9 pg. 85
- Rulers and protractors
- Compasses
- Graph paper
- Charts showing pentagons
- Compasses and rulers
- Protractors
- Manila paper
- Digital devices

- Observation - Oral questions - Written assignments

Measurements

Area - Surface area of triangular prisms
Area - Surface area of rectangular prisms

By the end of the lesson, the learner should be able to:

- Identify triangular prisms
- Sketch nets of triangular prisms
- Calculate surface area of triangular prisms

- Identify differences between triangular and rectangular prisms
- Sketch nets of triangular prisms
- Identify all faces from the net
- Calculate area of each face
- Add all areas to get total surface area

How do we find the surface area of a triangular prism?

- Master Mathematics Grade 9 pg. 85
- Models of prisms
- Graph paper
- Rulers
- Reference materials
- Cuboid models
- Manila paper
- Scissors
- Calculators

- Observation - Oral questions - Written assignments

Measurements

Area - Surface area of pyramids
Area - Surface area of square and rectangular pyramids

By the end of the lesson, the learner should be able to:

- Define different types of pyramids
- Sketch nets of pyramids
- Calculate surface area of triangular-based pyramids

- Make pyramid shapes using sticks or straws
- Count faces of different pyramids
- Sketch nets showing base and triangular faces
- Calculate area of base
- Calculate area of all triangular faces
- Add to get total surface area

How do we find the surface area of a pyramid?

- Master Mathematics Grade 9 pg. 85
- Sticks/straws
- Graph paper
- Protractors
- Reference books
- Calculators
- Pyramid models
- Charts

- Observation - Oral questions - Written assignments

Measurements

Area - Area of sectors of circles
Area - Area of segments of circles

By the end of the lesson, the learner should be able to:

- Define a sector of a circle
- Distinguish between major and minor sectors
- Calculate area of sectors using the formula

- Draw a circle and mark a clock face
- Identify sectors formed by clock hands
- Derive formula: Area = (θ/360) × πr²
- Calculate areas of sectors with different angles
- Use digital devices to watch videos on sectors

How do we find the area of a sector?

- Master Mathematics Grade 9 pg. 85
- Compasses and rulers
- Protractors
- Digital devices
- Internet access
- Compasses
- Rulers
- Calculators
- Graph paper

- Observation - Oral questions - Written assignments

Measurements

Area - Surface area of cones

By the end of the lesson, the learner should be able to:

- Define a cone and identify its parts
- Derive the formula for curved surface area
- Calculate surface area of solid cones

- Draw and cut a circle from manila paper
- Divide into two parts and fold to make a cone
- Identify slant height and radius
- Derive formula: πrl for curved surface
- Calculate total surface area: πrl + πr²
- Solve practical problems

How do we find the surface area of a cone?

- Master Mathematics Grade 9 pg. 85
- Manila paper
- Scissors
- Compasses and rulers
- Reference materials

- Observation - Oral questions - Written assignments

Measurements

Area - Surface area of spheres and hemispheres
Volume - Volume of triangular prisms

By the end of the lesson, the learner should be able to:

- Define a sphere and hemisphere
- Derive the formula for surface area of a sphere
- Calculate surface area of spheres and hemispheres

- Get a spherical ball and rectangular paper
- Cover ball with paper to form open cylinder
- Measure diameter and compare to height
- Derive formula: 4πr²
- Calculate surface area of hemispheres: 3πr²
- Solve real-life problems

How do we calculate the surface area of a sphere?

- Master Mathematics Grade 9 pg. 85
- Spherical balls
- Rectangular paper
- Rulers
- Calculators
- Master Mathematics Grade 9 pg. 102
- Straws and paper
- Sand or soil
- Measuring tools
- Reference books

- Observation - Oral questions - Written tests

Measurements

Volume - Volume of rectangular prisms
Volume - Volume of square-based pyramids

By the end of the lesson, the learner should be able to:

- Identify rectangular prisms (cuboids)
- Apply the volume formula for cuboids
- Solve problems involving rectangular prisms

- Identify that cuboids are prisms with rectangular cross-section
- Apply formula: V = l × w × h
- Calculate volumes with different measurements
- Solve real-life problems (water tanks, dump trucks)
- Convert between cubic units

How do we calculate the volume of a cuboid?

- Master Mathematics Grade 9 pg. 102
- Cuboid models
- Calculators
- Charts
- Reference materials
- Modeling materials
- Soil or sand
- Rulers

- Observation - Oral questions - Written tests

Measurements

Volume - Volume of rectangular-based pyramids
Volume - Volume of triangular-based pyramids

By the end of the lesson, the learner should be able to:

- Apply volume formula to rectangular-based pyramids
- Calculate base area of rectangles
- Solve problems involving rectangular pyramids

- Calculate area of rectangular base
- Apply formula: V = ⅓ × (l × w) × h
- Work out volumes with different dimensions
- Solve real-life problems (roofs, monuments)

How do we calculate volume of rectangular pyramids?

- Master Mathematics Grade 9 pg. 102
- Pyramid models
- Graph paper
- Calculators
- Reference books
- Triangular pyramid models
- Rulers
- Charts

- Observation - Oral questions - Written tests

Measurements

Volume - Introduction to volume of cones
Volume - Calculating volume of cones

By the end of the lesson, the learner should be able to:

- Define a cone as a circular-based pyramid
- Relate cone volume to cylinder volume
- Derive the volume formula for cones

- Model a cylinder and cone with same radius and height
- Fill cone with water and transfer to cylinder
- Observe that cone is ⅓ of cylinder
- Derive formula: V = ⅓πr²h
- Use digital devices to watch videos

How is a cone related to a cylinder?

- Master Mathematics Grade 9 pg. 102
- Cone and cylinder models
- Water
- Digital devices
- Internet access
- Cone models
- Calculators
- Graph paper
- Reference materials

- Observation - Oral questions - Written tests

Measurements

Volume - Volume of frustums of pyramids
Volume - Volume of frustums of cones

By the end of the lesson, the learner should be able to:

- Define a frustum
- Explain how to obtain a frustum
- Calculate volume of frustums of pyramids

- Model a pyramid and cut it parallel to base
- Identify the frustum formed
- Calculate volume of original pyramid
- Calculate volume of small pyramid cut off
- Apply formula: Volume of frustum = V(large) - V(small)

What is a frustum and how do we find its volume?

- Master Mathematics Grade 9 pg. 102
- Pyramid models
- Cutting tools
- Rulers
- Calculators
- Cone models
- Frustum examples
- Reference books

- Observation - Oral questions - Written tests

Measurements

Volume - Volume of spheres
Volume - Volume of hemispheres and applications

By the end of the lesson, the learner should be able to:

- Relate sphere volume to cone volume
- Derive the formula for volume of a sphere
- Calculate volumes of spheres

- Select hollow spherical object
- Model cone with same radius and height 2r
- Fill cone and transfer to sphere
- Observe that 2 cones fill the sphere
- Derive formula: V = 4/3πr³
- Calculate volumes with different radii

How do we find the volume of a sphere?

- Master Mathematics Grade 9 pg. 102
- Hollow spheres
- Cone models
- Water or soil
- Calculators
- Hemisphere models
- Real objects
- Reference materials

- Observation - Oral questions - Written tests

Measurements

Mass, Volume, Weight and Density - Conversion of units of mass

By the end of the lesson, the learner should be able to:

- Define mass and state its SI unit
- Identify different units of mass
- Convert between different units of mass

- Use balance to measure mass of objects
- Record masses in grams
- Study conversion table for mass units
- Convert between kg, g, mg, tonnes, etc.
- Apply conversions to real situations

How do we convert between different units of mass?

- Master Mathematics Grade 9 pg. 111
- Weighing balances
- Various objects
- Conversion charts
- Calculators

- Observation - Oral questions - Written tests

Measurements

Mass, Volume, Weight and Density - More practice on mass conversions
Mass, Volume, Weight and Density - Relationship between mass and weight

By the end of the lesson, the learner should be able to:

- Convert masses to kilograms
- Apply conversions in real-life contexts
- Appreciate the importance of mass measurements

- Convert various masses to kilograms
- Work with large masses (tonnes)
- Work with small masses (milligrams, micrograms)
- Solve practical problems (construction, medicine, shopping)

Why is it important to convert units of mass?

- Master Mathematics Grade 9 pg. 111
- Conversion tables
- Calculators
- Real-world examples
- Reference books
- Spring balances
- Various objects
- Charts

- Observation - Oral questions - Written assignments

Measurements

Mass, Volume, Weight and Density - Calculating mass and gravity
Mass, Volume, Weight and Density - Introduction to density

By the end of the lesson, the learner should be able to:

- Calculate mass when given weight
- Calculate gravity of different planets
- Apply weight formula in different contexts

- Rearrange formula to find mass: m = W/g
- Rearrange formula to find gravity: g = W/m
- Compare gravity on Earth, Moon, and other planets
- Solve problems involving astronauts on different planets

How do we calculate mass and gravity from weight?

- Master Mathematics Grade 9 pg. 111
- Calculators
- Charts showing planetary data
- Reference materials
- Digital devices
- Weighing balances
- Measuring cylinders
- Water
- Containers

- Observation - Oral questions - Written assignments

Measurements

Mass, Volume, Weight and Density - Calculating density, mass and volume
Mass, Volume, Weight and Density - Applications of density

By the end of the lesson, the learner should be able to:

- Apply density formula to find density
- Calculate mass using density formula
- Calculate volume using density formula

- Apply formula: D = M/V to find density
- Rearrange to find mass: M = D × V
- Rearrange to find volume: V = M/D
- Convert between g/cm³ and kg/m³
- Solve various problems

How do we use the density formula?

- Master Mathematics Grade 9 pg. 111
- Calculators
- Charts with formulas
- Various solid objects
- Reference books
- Density tables
- Real-world scenarios
- Reference materials

- Observation - Oral questions - Written assignments

Measurements

Time, Distance and Speed - Working out speed in km/h and m/s
Time, Distance and Speed - Calculating distance and time from speed

By the end of the lesson, the learner should be able to:

- Define speed
- Calculate speed in km/h
- Calculate speed in m/s
- Convert between km/h and m/s

- Go to field and mark two points 100 m apart
- Measure distance between points
- Time a person running between points
- Calculate speed: Speed = Distance/Time
- Calculate speed in m/s using metres and seconds
- Convert distance to kilometers and time to hours
- Calculate speed in km/h
- Convert km/h to m/s (divide by 3.6)
- Convert m/s to km/h (multiply by 3.6)

How do we calculate speed in different units?

- Master Mathematics Grade 9 pg. 117
- Stopwatches
- Tape measures
- Open field
- Calculators
- Conversion charts
- Formula charts
- Real-world examples
- Reference materials

- Observation - Oral questions - Written assignments

Measurements

Time, Distance and Speed - Working out average speed
Time, Distance and Speed - Determining velocity

By the end of the lesson, the learner should be able to:

- Define average speed
- Calculate average speed for journeys with varying speeds
- Distinguish between speed and average speed
- Solve multi-stage journey problems

- Identify two points with a midpoint
- Run from start to midpoint, walk from midpoint to end
- Calculate speed for each section
- Calculate total distance and total time
- Apply formula: Average speed = Total distance/Total time
- Solve problems on cyclists, buses, motorists
- Work with journeys having different speeds in different sections

What is average speed and how is it different from speed?

- Master Mathematics Grade 9 pg. 117
- Field with marked points
- Stopwatches
- Calculators
- Reference books
- Diagrams showing direction
- Charts
- Reference materials

- Observation - Oral questions - Written assignments

Measurements

Time, Distance and Speed - Working out acceleration
Time, Distance and Speed - Deceleration and applications

By the end of the lesson, the learner should be able to:

- Define acceleration
- Calculate acceleration from velocity changes
- Apply acceleration formula
- State units of acceleration (m/s²)
- Identify situations involving acceleration

- Walk from one point then run to another point
- Calculate velocity for each section
- Find difference in velocities (change in velocity)
- Define acceleration as rate of change of velocity
- Apply formula: a = (v - u)/t where v=final velocity, u=initial velocity, t=time
- Calculate acceleration when starting from rest (u=0)
- Calculate acceleration with initial velocity
- State that acceleration is measured in m/s²
- Identify real-life examples of acceleration

What is acceleration and how do we calculate it?

- Master Mathematics Grade 9 pg. 117
- Field for activity
- Stopwatches
- Measuring tools
- Calculators
- Formula charts
- Road safety materials
- Charts
- Reference materials

- Observation - Oral questions - Written assignments

Measurements

Time, Distance and Speed - Identifying longitudes on the globe
Time, Distance and Speed - Relating longitudes to time

By the end of the lesson, the learner should be able to:

- Identify longitudes on a globe
- Distinguish between latitudes and longitudes
- Use atlas to find longitudes of places
- State longitudes of various towns and cities

- Study globe showing longitudes and latitudes
- Identify that longitudes run North to South (meridians)
- Identify that latitudes run East to West
- Identify Greenwich Meridian (0°)
- Use atlas to find longitudes of various places
- Distinguish between East and West longitudes
- Find longitudes of towns in Kenya, Africa, and world map
- Identify islands at specific longitudes

What are longitudes and how do we identify them?

- Master Mathematics Grade 9 pg. 117
- Globes
- Atlases
- World maps
- Charts
- Time zone maps
- Calculators
- Digital devices

- Observation - Oral questions - Written assignments

Measurements

Time, Distance and Speed - Calculating time differences between places

By the end of the lesson, the learner should be able to:

- Calculate longitude differences
- Calculate time differences between places
- Apply rules for same side and opposite sides of Greenwich
- Convert time differences to hours and minutes

- Find longitude difference:
• Subtract longitudes if on same side of Greenwich
• Add longitudes if on opposite sides of Greenwich
- Multiply longitude difference by 4 minutes
- Convert minutes to hours and minutes
- Determine if place is ahead or behind GMT
- Solve problems on towns X and Z, Memphis and Kigali
- Complete tables with longitude and time differences

How do we calculate time difference from longitudes?

- Master Mathematics Grade 9 pg. 117
- Atlases
- Calculators
- Time zone charts
- Reference books

- Observation - Oral questions - Written assignments

Measurements

Time, Distance and Speed - Determining local time of places along different longitudes
Money - Identifying currencies of different countries

By the end of the lesson, the learner should be able to:

- Calculate local time when given GMT or another place's time
- Add or subtract time differences appropriately
- Account for date changes
- Solve complex time zone problems
- Apply knowledge to real-life situations

- Calculate time difference from longitude difference
- Add time if place is East of reference point (ahead)
- Subtract time if place is West of reference point (behind)
- Account for date changes when crossing midnight
- Solve problems with GMT as reference
- Solve problems with other places as reference
- Apply to phone calls, soccer matches, travel planning
- Work backwards to find longitude from time difference
- Determine whether places are East or West from time relationships

How do we find local time at different longitudes?

- Master Mathematics Grade 9 pg. 117
- World maps
- Calculators
- Time zone references
- Atlases
- Real-world scenarios
- Master Mathematics Grade 9 pg. 131
- Digital devices
- Internet access
- Pictures of currencies
- Reference materials

- Observation - Oral questions - Written tests - Problem-solving tasks

Measurements

Money - Converting foreign currency to Kenyan shillings
Money - Converting Kenyan shillings to foreign currency and buying/selling rates

By the end of the lesson, the learner should be able to:

- Define exchange rate
- Read and interpret exchange rate tables
- Convert foreign currencies to Kenyan shillings
- Apply exchange rates accurately

- Discuss dialogue about using foreign currency in Kenya
- Understand that each country has its own currency
- Learn about exchange rates and their purpose
- Study currency conversion tables (Table 3.5.1)
- Convert US dollars, Euros, and other currencies to Ksh
- Use formula: Ksh amount = Foreign amount × Exchange rate
- Solve practical problems involving conversion

How do we convert foreign currency to Kenya shillings?

- Master Mathematics Grade 9 pg. 131
- Currency conversion tables
- Calculators
- Charts
- Reference materials
- Exchange rate tables
- Real-world scenarios
- Reference books

- Observation - Oral questions - Written tests

Measurements

Money - Export duty on goods
Money - Import duty on goods

By the end of the lesson, the learner should be able to:

- Define export and export duty
- Explain the purpose of export duty
- Calculate product cost and export duty
- Solve problems on exported goods

- Discuss goods Kenya exports to other countries
- Understand how Kenya benefits from exports
- Define product cost and its components
- Apply formula: Product cost = Unit cost × Quantity
- Apply formula: Export duty = Tax rate × Product cost
- Calculate export duty on flowers, tea, coffee, cement
- Discuss importance of increasing exports

What is export duty and why is it charged?

- Master Mathematics Grade 9 pg. 131
- Calculators
- Examples of export goods
- Charts
- Reference materials
- Import duty examples
- Reference books

- Observation - Oral questions - Written tests

Measurements

Money - Excise duty and Value Added Tax (VAT)
Money - Combined duties and taxes on imported goods

By the end of the lesson, the learner should be able to:

- Define excise duty and VAT
- Identify goods subject to excise duty
- Calculate excise duty and VAT
- Distinguish between the two types of taxes

- Search online for goods subject to excise duty
- Study excise duty rates for different commodities
- Apply formula: Excise duty = Tax rate × Excise value
- Study Electronic Tax Register (ETR) receipts
- Learn that VAT is charged at 16% at multiple stages
- Calculate VAT on purchases
- Apply both taxes to various goods and services

What are excise duty and VAT?

- Master Mathematics Grade 9 pg. 131
- Digital devices
- ETR receipts
- Tax rate tables
- Calculators
- Reference materials
- Comprehensive examples
- Charts showing tax flow

- Observation - Oral questions - Written tests

Measurements

Approximations and Errors - Approximating quantities in measurements
Approximations and Errors - Determining errors using estimations and actual measurements

By the end of the lesson, the learner should be able to:

- Define approximation
- Approximate quantities using arbitrary units
- Use estimation in various contexts
- Appreciate the use of approximations in daily life

- Estimate length of teacher's table using palm length
- Estimate height of classroom door in metres
- Estimate width of textbook using palm
- Approximate distance using strides
- Approximate weight, capacity, temperature, time
- Use arbitrary units like strides and palm lengths
- Understand that approximations are not accurate
- Apply approximations in budgeting and planning

What is approximation and when do we use it?

- Master Mathematics Grade 9 pg. 146
- Tape measures
- Various objects to measure
- Containers for capacity
- Reference materials
- Measuring cylinders
- Water bottles
- Weighing scales
- Calculators

- Observation - Oral questions - Practical activities

Measurements

Approximations and Errors - Calculating percentage error
Approximations and Errors - Percentage error in real-life situations
Approximations and Errors - Complex applications and problem-solving

By the end of the lesson, the learner should be able to:

- Define percentage error
- Calculate percentage error from approximations
- Express error as a percentage of actual value
- Compare errors using percentages

- Make strides and estimate total distance
- Measure actual distance covered
- Calculate error: Estimated value - Actual value
- Apply formula: Percentage error = (Error/Actual value) × 100%
- Solve problems on pavement width
- Calculate percentage errors in various measurements
- Round answers appropriately

How do we calculate percentage error?

- Master Mathematics Grade 9 pg. 146
- Tape measures
- Calculators
- Open ground for activities
- Reference books
- Real-world scenarios
- Case studies
- Reference materials
- Complex scenarios
- Charts
- Real-world case studies

- Observation - Oral questions - Written tests