Mata the otter, the class guide

Maths for 5th Class

Curriculum Mapping Student Devices
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This course delivers the complete 5th Class mathematics curriculum through nine integrated modules covering place value and decimals, all four operations with whole numbers and decimals, fractions, decimals and percentages, measures, time and money, 2D and 3D shape with angles and symmetry, data handling, chance, coordinates, and early algebra. Students develop computational fluency, visualise concepts through manipulatives and real-life contexts, and apply skills in extended modelling projects such as designing a class garden, planning a school trip, and running a class shop. The distinctive emphasis on connecting mathematical strands through practical investigation and pupil-led modelling builds deep conceptual understanding and problem-solving confidence.
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Everything you need for Maths, all year.

A complete year of Maths, delivered by teacher-led interactive-whiteboard lessons, a printed pupil Activity Book, and a Teacher Resource Book, built to the NCCA Primary Mathematics Curriculum.

Interactive whiteboard lessons
Place value to thousands
Place value to thousands
Adding on the number line
Adding on the number line
Fractions, decimals & percentages
Fractions, decimals & percentages
Angles in a triangle
Angles in a triangle
Lines of symmetry
Lines of symmetry
Exploring 3D shapes
Exploring 3D shapes
Solving equations
Solving equations
Telling the time
Telling the time
Pupil Activity Book Mathematics 123learn Mata the otter Look inside
Teacher Resource Book Mathematics 123learn Teacher resource books and materials Look inside

Explore the Course

Click any lesson with to preview it

Extends the base-ten system from whole numbers to decimals to thousandths; builds fluency in reading, writing, partitioning and comparing decimals; introduces percentages and negative numbers.

What We Already Know: Place Value to Millions Sample Activity Book Teacher Resources
One Whole, Ten Parts: Introducing Tenths Sample Activity Book Extension Sheet Teacher Resources
Reading Decimals to Tenths and Hundredths Sample Activity Book Extension Sheet Teacher Resources
Decimals on a Number Line
Comparing Two Decimals
Ordering a Set of Decimals
Decimals to Thousandths
Rounding Decimals to the Nearest Whole, Tenth, Hundredth
Money Is Decimal: Euro 1.20 and Euro 1.02 Are Not the Same
Percent as Out of One Hundred
Equivalent Fractions, Decimals, Percents: First Walk
Equivalent Fractions, Decimals, Percents: Independent
Negative Numbers: First Encounter
Comparing Positive and Negative Numbers
Real-life Decimals: Class Survey
Module Assessment: What's My Number?

Extends the four operations to multi-digit whole numbers and decimals; builds operation flexibility; introduces factors, multiples and prime / composite numbers.

Mental Addition Strategies: Partitioning and Compensating Sample Activity Book Extension Sheet Teacher Resources
Written Addition: Multi-digit Whole Numbers Sample Activity Book Extension Sheet Teacher Resources
Adding Decimals: Line up the Points Sample Activity Book Extension Sheet Teacher Resources
Subtraction Strategies: Counting on, Take Away, Decomposition
Subtracting Decimals
Multiplication Facts: Unfinished Business
Multiplying by 10, 100, 1000
Multiplying a Multi-digit Number by a Single Digit
Multiplying Two Two-digit Numbers
Dividing by a Single Digit: the Bus-stop Method
Division with Decimal Answers: Sharing What's Left
Order of Operations: Brackets, Division, Multiplication, Addition, Subtraction
Factors, Multiples, Prime and Composite Numbers
Module Assessment: Operation Toolbox in a Class-trip Plan

Builds flexible movement between fractions, decimals and percentages; introduces ratio and proportion.

What Is a Fraction? Review Part-whole Sample Activity Book Extension Sheet Teacher Resources
Equivalent Fractions Sample Activity Book Extension Sheet Teacher Resources
Simplifying Fractions Sample Activity Book Extension Sheet Teacher Resources
Comparing Two Fractions
Ordering a Set of Fractions
Adding and Subtracting Fractions with the Same Denominator
Adding and Subtracting Fractions with Different Denominators
Fraction of a Quantity
Decimals and Fractions: They're the Same Thing
Percent of a Quantity: 10%, 25%, 50%
Discount and Increase: Euro 30 Reduced by 20%
Ratio: the Basic Idea
Sharing in a Ratio
Proportion: Scale up the Recipe
Module Assessment: Fraction Shop

Moves from whole-number measures to fractional and decimal measures; develops estimation; introduces area of triangles and composite shapes and volume of cuboids.

Estimating Then Measuring: Length Sample Activity Book Extension Sheet Teacher Resources
Reading Scales to the Nearest Millimetre Sample Activity Book Extension Sheet Teacher Resources
Converting Length Units Sample Activity Book Extension Sheet Teacher Resources
Perimeter: Adding Sides up
Area of Rectangles
Area of Triangles: Half a Rectangle
Composite Shapes: Break It Into Rectangles and Triangles
Mass: Weighing in G and Kg
Converting Mass Units
Capacity: Measuring Jugs
Converting Capacity Units
Volume of Cuboids
Estimation Across Attributes
Solving Real Measurement Problems
Module Assessment: Design a Class Garden Bed

Reads, writes and reasons about time across 12-hour and 24-hour formats and elapsed-time problems; budgets and reasons about transactions.

Reading the Analog Clock to the Nearest Minute Sample Activity Book Extension Sheet Teacher Resources
24-hour Time Sample Activity Book Extension Sheet Teacher Resources
Elapsed Time: Counting on Through the Hour Sample Activity Book Extension Sheet Teacher Resources
Elapsed Time Across Hours and Across Midnight
Reading a Real Timetable: Irish Rail Cork to Dublin
Money: Review of Euro and Cent
Adding and Subtracting Money: Written and Mental
Making Change
Comparing Prices: Best Value
Building a Class Budget
Sale Prices in a Shop: Multi-step Money Problems
Module Assessment: Plan a School Trip

Investigates properties of 2D and 3D shapes; introduces angles, angle sums, circles, compass-and-ruler construction, symmetry, transformations and tessellation.

Naming and Sorting 2D and 3D Shapes Sample Activity Book Extension Sheet Teacher Resources
Nets: Flat to 3D and Back Sample Activity Book Extension Sheet Teacher Resources
Angles: What Is an Angle? Sample Activity Book Extension Sheet Teacher Resources
Measuring Angles with a Protractor
Drawing Angles with a Protractor
Angle Sums in Triangles and Quadrilaterals
Parts of a Circle: Centre, Radius, Diameter, Circumference
Drawing Circles with a Compass
Circumference: Measuring Round Things and Meeting Pi
Construction: Triangles from Sides, Bisecting Lines and Angles
Symmetry: Lines and Rotational
Isometric Drawing: Drawing a Cuboid on Dot Paper
Transformations: Translation, Reflection, Rotation and Enlargement
Module Assessment: Tessellate a Quilt Block

Poses questions; collects, organises and represents data; reasons about chance; introduces scale drawings and the four-quadrant co-ordinate plane.

Posing a Question and Tallying the Data Sample Activity Book Extension Sheet Teacher Resources
Scale Drawings and Scale Maps: Small Drawings of Big Things Sample Activity Book Teacher Resources
Bar Charts: Drawing and Reading Sample Activity Book Extension Sheet Teacher Resources
Bar Charts: Choosing a Scale
Pie Charts: First Encounter
Mean, Median, Mode, Range: Measures of Centre and Spread
Class Survey: Pose, Collect, Summarise, Present
Chance: Likely, Unlikely, Certain, Impossible
Probability as a Fraction: Out of Total Outcomes
Probability as a Decimal and Percentage
First Quadrant of the Co-ordinate Plane
All Four Quadrants: First Walk
Drawing a Shape from a List of Co-ordinates
Module Assessment: What Does Our Class Look Like?

Identifies rules in patterns and expresses them in words, diagrams and letter-symbols; introduces equations and the balance model.

Continuing a Pattern: What Comes Next? Sample Activity Book Extension Sheet Teacher Resources
Describing a Rule in Words Sample Activity Book Extension Sheet Teacher Resources
Tables of Values: Input to Output Sample Activity Book Extension Sheet Teacher Resources
Finding the Rule from a Table
Letter-symbols: Using a Letter for an Unknown
Equality and the Balance
Solving Simple Equations: Find the Missing Value
Forming an Equation from a Story
Two-step Equations: Informal Solving
Investigation: the Staircase Pattern
Properties of Operations: Commutative, Associative, Distributive
Module Assessment: Pattern Hunt

Caps the year with open-ended modeling tasks, a five-strand recap, a portfolio review and a class maths fair.

End-of-year Strands Recap: Five-strand IWB Tour Sample Activity Book Extension Sheet Teacher Resources
Big Investigation: How Tall Is the School? Sample Activity Book Extension Sheet Teacher Resources
Class Shop Modeling: Designed by Pupils Sample Activity Book Extension Sheet Teacher Resources
Plan Our Class Trip: Glendalough or Newgrange?
Design Our 6th Class Welcome Poster
Predict Next Year's School Enrolment
Maths Journal Review and Self-assessment
Class Maths Fair

Extends the base-ten system from whole numbers to decimals to thousandths; builds fluency in reading, writing, partitioning and comparing decimals; introduces percentages and negative numbers.

What We Already Know: Place Value to Millions Sample Activity Book Teacher Resources
One Whole, Ten Parts: Introducing Tenths Sample Activity Book Extension Sheet Teacher Resources
Reading Decimals to Tenths and Hundredths Sample Activity Book Extension Sheet Teacher Resources
Decimals on a Number Line
Comparing Two Decimals
Ordering a Set of Decimals
Decimals to Thousandths
Rounding Decimals to the Nearest Whole, Tenth, Hundredth
Money Is Decimal: Euro 1.20 and Euro 1.02 Are Not the Same
Percent as Out of One Hundred
Equivalent Fractions, Decimals, Percents: First Walk
Equivalent Fractions, Decimals, Percents: Independent
Negative Numbers: First Encounter
Comparing Positive and Negative Numbers
Real-life Decimals: Class Survey
Module Assessment: What's My Number?

Extends the four operations to multi-digit whole numbers and decimals; builds operation flexibility; introduces factors, multiples and prime / composite numbers.

Mental Addition Strategies: Partitioning and Compensating Sample Activity Book Extension Sheet Teacher Resources
Written Addition: Multi-digit Whole Numbers Sample Activity Book Extension Sheet Teacher Resources
Adding Decimals: Line up the Points Sample Activity Book Extension Sheet Teacher Resources
Subtraction Strategies: Counting on, Take Away, Decomposition
Subtracting Decimals
Multiplication Facts: Unfinished Business
Multiplying by 10, 100, 1000
Multiplying a Multi-digit Number by a Single Digit
Multiplying Two Two-digit Numbers
Dividing by a Single Digit: the Bus-stop Method
Division with Decimal Answers: Sharing What's Left
Order of Operations: Brackets, Division, Multiplication, Addition, Subtraction
Factors, Multiples, Prime and Composite Numbers
Module Assessment: Operation Toolbox in a Class-trip Plan

Builds flexible movement between fractions, decimals and percentages; introduces ratio and proportion.

What Is a Fraction? Review Part-whole Sample Activity Book Extension Sheet Teacher Resources
Equivalent Fractions Sample Activity Book Extension Sheet Teacher Resources
Simplifying Fractions Sample Activity Book Extension Sheet Teacher Resources
Comparing Two Fractions
Ordering a Set of Fractions
Adding and Subtracting Fractions with the Same Denominator
Adding and Subtracting Fractions with Different Denominators
Fraction of a Quantity
Decimals and Fractions: They're the Same Thing
Percent of a Quantity: 10%, 25%, 50%
Discount and Increase: Euro 30 Reduced by 20%
Ratio: the Basic Idea
Sharing in a Ratio
Proportion: Scale up the Recipe
Module Assessment: Fraction Shop

Moves from whole-number measures to fractional and decimal measures; develops estimation; introduces area of triangles and composite shapes and volume of cuboids.

Estimating Then Measuring: Length Sample Activity Book Extension Sheet Teacher Resources
Reading Scales to the Nearest Millimetre Sample Activity Book Extension Sheet Teacher Resources
Converting Length Units Sample Activity Book Extension Sheet Teacher Resources
Perimeter: Adding Sides up
Area of Rectangles
Area of Triangles: Half a Rectangle
Composite Shapes: Break It Into Rectangles and Triangles
Mass: Weighing in G and Kg
Converting Mass Units
Capacity: Measuring Jugs
Converting Capacity Units
Volume of Cuboids
Estimation Across Attributes
Solving Real Measurement Problems
Module Assessment: Design a Class Garden Bed

Reads, writes and reasons about time across 12-hour and 24-hour formats and elapsed-time problems; budgets and reasons about transactions.

Reading the Analog Clock to the Nearest Minute Sample Activity Book Extension Sheet Teacher Resources
24-hour Time Sample Activity Book Extension Sheet Teacher Resources
Elapsed Time: Counting on Through the Hour Sample Activity Book Extension Sheet Teacher Resources
Elapsed Time Across Hours and Across Midnight
Reading a Real Timetable: Irish Rail Cork to Dublin
Money: Review of Euro and Cent
Adding and Subtracting Money: Written and Mental
Making Change
Comparing Prices: Best Value
Building a Class Budget
Sale Prices in a Shop: Multi-step Money Problems
Module Assessment: Plan a School Trip

Investigates properties of 2D and 3D shapes; introduces angles, angle sums, circles, compass-and-ruler construction, symmetry, transformations and tessellation.

Naming and Sorting 2D and 3D Shapes Sample Activity Book Extension Sheet Teacher Resources
Nets: Flat to 3D and Back Sample Activity Book Extension Sheet Teacher Resources
Angles: What Is an Angle? Sample Activity Book Extension Sheet Teacher Resources
Measuring Angles with a Protractor
Drawing Angles with a Protractor
Angle Sums in Triangles and Quadrilaterals
Parts of a Circle: Centre, Radius, Diameter, Circumference
Drawing Circles with a Compass
Circumference: Measuring Round Things and Meeting Pi
Construction: Triangles from Sides, Bisecting Lines and Angles
Symmetry: Lines and Rotational
Isometric Drawing: Drawing a Cuboid on Dot Paper
Transformations: Translation, Reflection, Rotation and Enlargement
Module Assessment: Tessellate a Quilt Block

Poses questions; collects, organises and represents data; reasons about chance; introduces scale drawings and the four-quadrant co-ordinate plane.

Posing a Question and Tallying the Data Sample Activity Book Extension Sheet Teacher Resources
Scale Drawings and Scale Maps: Small Drawings of Big Things Sample Activity Book Teacher Resources
Bar Charts: Drawing and Reading Sample Activity Book Extension Sheet Teacher Resources
Bar Charts: Choosing a Scale
Pie Charts: First Encounter
Mean, Median, Mode, Range: Measures of Centre and Spread
Class Survey: Pose, Collect, Summarise, Present
Chance: Likely, Unlikely, Certain, Impossible
Probability as a Fraction: Out of Total Outcomes
Probability as a Decimal and Percentage
First Quadrant of the Co-ordinate Plane
All Four Quadrants: First Walk
Drawing a Shape from a List of Co-ordinates
Module Assessment: What Does Our Class Look Like?

Identifies rules in patterns and expresses them in words, diagrams and letter-symbols; introduces equations and the balance model.

Continuing a Pattern: What Comes Next? Sample Activity Book Extension Sheet Teacher Resources
Describing a Rule in Words Sample Activity Book Extension Sheet Teacher Resources
Tables of Values: Input to Output Sample Activity Book Extension Sheet Teacher Resources
Finding the Rule from a Table
Letter-symbols: Using a Letter for an Unknown
Equality and the Balance
Solving Simple Equations: Find the Missing Value
Forming an Equation from a Story
Two-step Equations: Informal Solving
Investigation: the Staircase Pattern
Properties of Operations: Commutative, Associative, Distributive
Module Assessment: Pattern Hunt

Caps the year with open-ended modeling tasks, a five-strand recap, a portfolio review and a class maths fair.

End-of-year Strands Recap: Five-strand IWB Tour Sample Activity Book Extension Sheet Teacher Resources
Big Investigation: How Tall Is the School? Sample Activity Book Extension Sheet Teacher Resources
Class Shop Modeling: Designed by Pupils Sample Activity Book Extension Sheet Teacher Resources
Plan Our Class Trip: Glendalough or Newgrange?
Design Our 6th Class Welcome Poster
Predict Next Year's School Enrolment
Maths Journal Review and Self-assessment
Class Maths Fair

Curriculum Mapping

See exactly how this course maps to official curriculum specifications

NCCA Primary Mathematics Curriculum (2025)
Curriculum Area
Outcomes
Algebra
Patterns, rules and relationships
ALG.PRR.4a ALG.PRR.4b
Expressions and equations
ALG.EXP.4
Data and chance
Data
DAT.DAT.4a DAT.DAT.4b
Chance
DAT.CHN.4a DAT.CHN.4b
Measures
Measuring
MEA.MSR.4a MEA.MSR.4b
Time
MEA.TIM.4
Money
MEA.MON.4
Number
Place value and base ten
NUM.PVT.4
Sets and operations
NUM.OPS.4
Fractions
NUM.FRC.4a NUM.FRC.4b
Shape and space
Spatial awareness and location
SHA.SAL.4a SHA.SAL.4b
Shape
SHA.SHP.4a SHA.SHP.4b
Transformation
SHA.TRN.4a SHA.TRN.4b

The curriculum does not include official reference codes for individual learning outcomes, so we have assigned a code scheme to make it easier to identify and track coverage.

What Students Will Learn

Learning Goals

  1. Master place value, decimals to thousandths, negative numbers, and their connections to fractions, percentages and money
  2. Develop fluency in mental and written strategies for addition, subtraction, multiplication and division with whole numbers and decimals
  3. Work confidently with fractions, equivalent forms, operations, ratio, proportion and percentage of quantities
  4. Measure and calculate accurately using metric units for length, mass, capacity, perimeter, area and volume in real contexts
  5. Apply mathematical understanding to data handling, probability, algebra, shape, time, money and open-ended modelling projects

Learning Outcomes

  1. Read, write, compare, order and round decimals up to thousandths, including on a number line and in money contexts.
  2. Add, subtract, multiply and divide whole numbers and decimals using mental strategies, column methods and the bus-stop division algorithm.
  3. Simplify, compare, order, add and subtract fractions with same and different denominators, and find fractions and percentages of quantities.
  4. Convert between metric units of length, mass and capacity; calculate perimeter, area of rectangles and triangles, and volume of cuboids.
  5. Read analogue and 24-hour clocks, calculate elapsed time, read timetables, add and subtract money, and solve multi-step money problems.

What You'll Need

Required Equipment

Equipment used in some of the lessons in this course. Items can be shared among students.

3D solids
base-ten blocks
Demonstration ruler
Dienes blocks
IWB/Projector/Large Screen
IWB/Projector/Large Screen
Masking tape
Metre stick
Polydron
Pupil ruler
Real household solids
Sequences and Number Lines sheet
Tally frame worksheet

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