Oisín the red deer, the class guide

Maths for 3rd Class

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This course builds a solid foundation in third-class mathematics, covering place value to 1,000, the four operations with mental and written strategies, fractions, decimals, measures, area, perimeter, volume, time, money, 2D and 3D shapes, angles, symmetry, location, data handling, chance and early algebra. Through practical investigations, visual models and real-world problems, pupils develop fluency, reasoning and problem-solving skills across the full primary mathematics curriculum.
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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 Oisín the red deer Look inside
Teacher Resource Book Mathematics 123learn Teacher resource books and materials

Explore the Course

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Build place value across the hundreds. Pupils read, write, partition, compare, order, round and estimate whole numbers to 1,000, with a first look beyond.

Place Value to 100: Tens and Units Sample Activity Book Extension Sheet Teacher Resources
Place Value to 1,000: the Hundreds Column Sample Activity Book Extension Sheet Teacher Resources
Reading and Writing 3-digit Numbers Sample Activity Book Extension Sheet Teacher Resources
Partitioning Numbers
Comparing Numbers to 1,000 Digit-by-digit
Ordering a Set of Numbers to 1,000
Placing and Estimating Numbers on a 0 to 1,000 Number Line
Counting on and Back in 10s and 100s; 1, 10, 100 More or Less
Rounding to the Nearest 10
Rounding to the Nearest 100
A First Look Beyond 1,000: the Thousands
Place-value Investigation and Review: Biggest and Smallest Numbers

Introduce flexible mental strategies and secure written methods for the four operations with small numbers, and the links between them.

Mental Addition Strategies Within 100
Mental Subtraction Strategies Within 100
Written Addition of 2-digit Numbers with Renaming
Written Addition of 3-digit Numbers
Written Subtraction of 2-digit Numbers with Renaming
Written Subtraction of 3-digit Numbers
Addition and Subtraction Word Problems: Choose the Operation
Multiplication: Equal Groups and the 2, 4 and 10 Tables
Multiplication: the 5, 3 and 6 Tables and Patterns
Multiplication as Arrays and Repeated Addition
Multiplying a 2-digit Number by 1 Digit: Partition First
Multiplication Facts: Practice and Fluency
Division as Sharing Equally
Division as Grouping and the Division to Multiplication Link
Division with Remainders: a First Look
Mixed-operation Problem Solving: Which Operation?

Name, compare and find fractions of quantities, meet equivalence as a first look, and meet tenths as the first decimals, with a gentle first touch of hundredths.

What Is a Fraction? Halves, Quarters and Thirds
Fractions of a Shape, a Length and a Set
Naming Fractions: Fifths, Eighths and Tenths
Fractions on a Number Line
Equivalent Fractions: a First Look (1/2 = 2/4)
Comparing Fractions with the Same Bottom Number
Ordering Simple Fractions
Finding a Half, a Third and a Quarter of a Quantity
Tenths: the First Decimal Place
Reading and Writing Tenths; Tenths on a Number Line
Tenths in Money and Measure (Half a Metre, Half a Litre)
Hundredths: a Gentle First Look (0.01 = 1/100)
Linking Simple Fractions and Decimals (1/2 = 0.5, 1/4 = 0.25)
Fractions and Decimals Review

Estimate and measure length, weight and capacity with the right instrument and unit, and take a first look at renaming metric units.

Length: Estimate and Measure with a Ruler (Cm)
Length: Centimetres and Millimetres
Length: Metres; Choosing the Right Unit
Renaming Length (M to Cm): a First Look
Weight: Estimate and Weigh in Kilograms and Grams
Reading Weighing Scales
Capacity: Estimate and Measure in Litres and Millilitres
Reading a Measuring Jug
Measures Word Problems (Length, Weight, Capacity)
Measures Investigation: Estimate Then Measure Around the Room

Find perimeter by adding the sides, area by counting square units, and volume by counting unit cubes, all by counting with a first gentle link to multiplication.

Perimeter: the Distance All the Way Around
Perimeter of Rectangles and Simple Shapes
Area by Counting Square Units
Area of Rectangles by Counting Rows and Columns
Comparing Area and Perimeter: an Investigation
Volume: Counting Unit Cubes (a First Look)
Area, Perimeter and Volume Review

Tell the time to 5-minute intervals across analog and digital, work with units of time and the calendar, and calculate with euro and cent in everyday money contexts.

Telling Time: O'clock, Half Past, Quarter Past and to (Review)
Telling Time to 5-minute Intervals
Analog and Digital Time
Days, Weeks, Months and the Calendar
Units of Time and How They Relate
Simple Elapsed Time: How Long Has Passed
Money: Coins and Notes; Making Amounts in Euro and Cent
Money: Adding Prices and Totalling
Money: Giving Change (a First Look)
Money: Spending a Small Amount
Time and Money Review

Name and sort 2D and 3D shapes by their properties, name the parts of a circle, and recognise and compare angles as amounts of turn, all concrete and introductory.

2D Shapes: Naming and Counting Sides and Corners
Sorting 2D Shapes by Their Properties
Triangles and Quadrilaterals
Pentagons, Hexagons and Octagons
The Circle: Centre, Radius and Diameter
3D Shapes: Naming and Sorting
3D Shapes: Faces, Edges and Corners
3D Shapes: Nets (a First Look)
Angles: an Angle Is an Amount of Turn
Right Angles: Finding Them in Shapes and the Room
Angles Smaller and Bigger Than a Right Angle
Angles in Shapes
Shape and Angle Investigation and Review

Find lines of symmetry, model reflections, turns, slides and tessellations, give and follow directions, and read simple grid references.

Line Symmetry: Finding Lines of Symmetry
Completing Symmetrical Pictures Across a Mirror Line
Reflecting a Shape Across a Line
Turns: Quarter, Half and Three-quarter Turns
Sliding Shapes (Translation) on Squared Paper
Tessellation: Shapes That Fit Together
Directions and Routes (Left/right, Forwards/back, N/S/E/W)
Simple Grid References: Finding a Square
Location and Transformation Investigation

Pose questions and collect, display and read data with tallies, pictograms and bar charts and the mode, and describe and test the likelihood of events.

Posing a Question and Collecting Data with a Tally
Tally Charts and Frequency Tables
Pictograms: One Symbol Means One
Pictograms: Reading and Answering Questions
Pictograms with a Scale (One Symbol = 2)
Making a Block Graph with a Scale of One
Reading and Interpreting Bar Charts
Bar Charts with a Scale of Two
Sorting with Carroll and Venn Diagrams
The Mode: the Most Common Value
Chance: Certain, Possible and Impossible
Chance: Likely and Unlikely
Testing Chance with Dice and Spinners
Data and Chance Investigation: Survey and Show

Find and use the rule behind number and shape patterns, read and solve number sentences with a missing value, and close the year with a cross-strand review.

Number Patterns and Sequences: Find the Rule
Growing Patterns: Predict the Next Ones
Repeating Patterns (Shape and Colour) and Their Rule
Counting Patterns and Multiples on the Hundred Square
The Equals Sign Means Balance
Finding the Missing Number (Box + 4 = 10)
Using a Box or a Letter for the Unknown
Turning a Word Problem Into a Number Sentence
Fact Families and the Link Between + and -
The Link Between Times and Share (Multiplication and Division)
Equivalent Expressions (4 + 4 + 4 = 3 X 4)
Patterns and Rules Investigation
End-of-year Review: Number, Measures and Shape
End-of-year Review: Data, Chance and Algebra; Maths-journal Reflection

Build place value across the hundreds. Pupils read, write, partition, compare, order, round and estimate whole numbers to 1,000, with a first look beyond.

Place Value to 100: Tens and Units Sample Activity Book Extension Sheet Teacher Resources
Place Value to 1,000: the Hundreds Column Sample Activity Book Extension Sheet Teacher Resources
Reading and Writing 3-digit Numbers Sample Activity Book Extension Sheet Teacher Resources
Partitioning Numbers
Comparing Numbers to 1,000 Digit-by-digit
Ordering a Set of Numbers to 1,000
Placing and Estimating Numbers on a 0 to 1,000 Number Line
Counting on and Back in 10s and 100s; 1, 10, 100 More or Less
Rounding to the Nearest 10
Rounding to the Nearest 100
A First Look Beyond 1,000: the Thousands
Place-value Investigation and Review: Biggest and Smallest Numbers

Introduce flexible mental strategies and secure written methods for the four operations with small numbers, and the links between them.

Mental Addition Strategies Within 100
Mental Subtraction Strategies Within 100
Written Addition of 2-digit Numbers with Renaming
Written Addition of 3-digit Numbers
Written Subtraction of 2-digit Numbers with Renaming
Written Subtraction of 3-digit Numbers
Addition and Subtraction Word Problems: Choose the Operation
Multiplication: Equal Groups and the 2, 4 and 10 Tables
Multiplication: the 5, 3 and 6 Tables and Patterns
Multiplication as Arrays and Repeated Addition
Multiplying a 2-digit Number by 1 Digit: Partition First
Multiplication Facts: Practice and Fluency
Division as Sharing Equally
Division as Grouping and the Division to Multiplication Link
Division with Remainders: a First Look
Mixed-operation Problem Solving: Which Operation?

Name, compare and find fractions of quantities, meet equivalence as a first look, and meet tenths as the first decimals, with a gentle first touch of hundredths.

What Is a Fraction? Halves, Quarters and Thirds
Fractions of a Shape, a Length and a Set
Naming Fractions: Fifths, Eighths and Tenths
Fractions on a Number Line
Equivalent Fractions: a First Look (1/2 = 2/4)
Comparing Fractions with the Same Bottom Number
Ordering Simple Fractions
Finding a Half, a Third and a Quarter of a Quantity
Tenths: the First Decimal Place
Reading and Writing Tenths; Tenths on a Number Line
Tenths in Money and Measure (Half a Metre, Half a Litre)
Hundredths: a Gentle First Look (0.01 = 1/100)
Linking Simple Fractions and Decimals (1/2 = 0.5, 1/4 = 0.25)
Fractions and Decimals Review

Estimate and measure length, weight and capacity with the right instrument and unit, and take a first look at renaming metric units.

Length: Estimate and Measure with a Ruler (Cm)
Length: Centimetres and Millimetres
Length: Metres; Choosing the Right Unit
Renaming Length (M to Cm): a First Look
Weight: Estimate and Weigh in Kilograms and Grams
Reading Weighing Scales
Capacity: Estimate and Measure in Litres and Millilitres
Reading a Measuring Jug
Measures Word Problems (Length, Weight, Capacity)
Measures Investigation: Estimate Then Measure Around the Room

Find perimeter by adding the sides, area by counting square units, and volume by counting unit cubes, all by counting with a first gentle link to multiplication.

Perimeter: the Distance All the Way Around
Perimeter of Rectangles and Simple Shapes
Area by Counting Square Units
Area of Rectangles by Counting Rows and Columns
Comparing Area and Perimeter: an Investigation
Volume: Counting Unit Cubes (a First Look)
Area, Perimeter and Volume Review

Tell the time to 5-minute intervals across analog and digital, work with units of time and the calendar, and calculate with euro and cent in everyday money contexts.

Telling Time: O'clock, Half Past, Quarter Past and to (Review)
Telling Time to 5-minute Intervals
Analog and Digital Time
Days, Weeks, Months and the Calendar
Units of Time and How They Relate
Simple Elapsed Time: How Long Has Passed
Money: Coins and Notes; Making Amounts in Euro and Cent
Money: Adding Prices and Totalling
Money: Giving Change (a First Look)
Money: Spending a Small Amount
Time and Money Review

Name and sort 2D and 3D shapes by their properties, name the parts of a circle, and recognise and compare angles as amounts of turn, all concrete and introductory.

2D Shapes: Naming and Counting Sides and Corners
Sorting 2D Shapes by Their Properties
Triangles and Quadrilaterals
Pentagons, Hexagons and Octagons
The Circle: Centre, Radius and Diameter
3D Shapes: Naming and Sorting
3D Shapes: Faces, Edges and Corners
3D Shapes: Nets (a First Look)
Angles: an Angle Is an Amount of Turn
Right Angles: Finding Them in Shapes and the Room
Angles Smaller and Bigger Than a Right Angle
Angles in Shapes
Shape and Angle Investigation and Review

Find lines of symmetry, model reflections, turns, slides and tessellations, give and follow directions, and read simple grid references.

Line Symmetry: Finding Lines of Symmetry
Completing Symmetrical Pictures Across a Mirror Line
Reflecting a Shape Across a Line
Turns: Quarter, Half and Three-quarter Turns
Sliding Shapes (Translation) on Squared Paper
Tessellation: Shapes That Fit Together
Directions and Routes (Left/right, Forwards/back, N/S/E/W)
Simple Grid References: Finding a Square
Location and Transformation Investigation

Pose questions and collect, display and read data with tallies, pictograms and bar charts and the mode, and describe and test the likelihood of events.

Posing a Question and Collecting Data with a Tally
Tally Charts and Frequency Tables
Pictograms: One Symbol Means One
Pictograms: Reading and Answering Questions
Pictograms with a Scale (One Symbol = 2)
Making a Block Graph with a Scale of One
Reading and Interpreting Bar Charts
Bar Charts with a Scale of Two
Sorting with Carroll and Venn Diagrams
The Mode: the Most Common Value
Chance: Certain, Possible and Impossible
Chance: Likely and Unlikely
Testing Chance with Dice and Spinners
Data and Chance Investigation: Survey and Show

Find and use the rule behind number and shape patterns, read and solve number sentences with a missing value, and close the year with a cross-strand review.

Number Patterns and Sequences: Find the Rule
Growing Patterns: Predict the Next Ones
Repeating Patterns (Shape and Colour) and Their Rule
Counting Patterns and Multiples on the Hundred Square
The Equals Sign Means Balance
Finding the Missing Number (Box + 4 = 10)
Using a Box or a Letter for the Unknown
Turning a Word Problem Into a Number Sentence
Fact Families and the Link Between + and -
The Link Between Times and Share (Multiplication and Division)
Equivalent Expressions (4 + 4 + 4 = 3 X 4)
Patterns and Rules Investigation
End-of-year Review: Number, Measures and Shape
End-of-year Review: Data, Chance and Algebra; Maths-journal Reflection

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.1 ALG.PRR.2 ALG.PRR.3a ALG.PRR.3b ALG.PRR.4a ALG.PRR.4b
Expressions and equations
ALG.EXP.2 ALG.EXP.3 ALG.EXP.4
Data and chance
Data
DAT.DAT.1 DAT.DAT.2 DAT.DAT.3 DAT.DAT.4a DAT.DAT.4b
Chance
DAT.CHN.3 DAT.CHN.4a DAT.CHN.4b
Measures
Measuring
MEA.MSR.1 MEA.MSR.2 MEA.MSR.3a MEA.MSR.3b MEA.MSR.4a MEA.MSR.4b
Time
MEA.TIM.1 MEA.TIM.2a MEA.TIM.2b MEA.TIM.3a MEA.TIM.3b MEA.TIM.4
Money
MEA.MON.1 MEA.MON.2 MEA.MON.3 MEA.MON.4
Number
Uses of number
NUM.USE.1
Numeration and counting
NUM.NCT.1a NUM.NCT.1b NUM.NCT.2
Place value and base ten
NUM.PVT.1 NUM.PVT.2a NUM.PVT.2b NUM.PVT.3 NUM.PVT.4
Sets and operations
NUM.OPS.1 NUM.OPS.2 NUM.OPS.3 NUM.OPS.4
Fractions
NUM.FRC.1 NUM.FRC.2a NUM.FRC.2b NUM.FRC.3a NUM.FRC.3b NUM.FRC.4a NUM.FRC.4b
Shape and space
Spatial awareness and location
SHA.SAL.1a SHA.SAL.1b SHA.SAL.2a SHA.SAL.2b SHA.SAL.3a SHA.SAL.3b SHA.SAL.4a SHA.SAL.4b
Shape
SHA.SHP.1 SHA.SHP.2 SHA.SHP.3a SHA.SHP.3b SHA.SHP.4a SHA.SHP.4b
Transformation
SHA.TRN.1 SHA.TRN.2 SHA.TRN.3 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. Develop deep understanding of place value to 1,000 and apply it to compare, order, round and represent numbers
  2. Build fluency in mental and written strategies for addition, subtraction, multiplication and division, including solving word problems
  3. Recognise, compare and order fractions and decimals, and connect them to real-life contexts such as money and measurement
  4. Measure and calculate length, weight, capacity, perimeter, area and volume using appropriate units and tools
  5. Explore 2D and 3D shapes, angles, symmetry, transformations, data handling, chance and algebraic patterns through practical investigation

Learning Outcomes

  1. Read, write, partition and compare 3-digit whole numbers using place value columns up to 1,000.
  2. Add and subtract 2- and 3-digit numbers using mental strategies and written column methods with renaming.
  3. Recall and use multiplication facts for the 2, 3, 4, 5, 6 and 10 times tables and relate them to division with and without remainders.
  4. Recognise, name, compare and order simple fractions and tenths; link common fractions to their decimal equivalents.
  5. Estimate, measure and solve problems involving length in centimetres and metres, weight in kilograms and grams, and capacity in litres and millilitres.

What You'll Need

Required Equipment

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

IWB/Projector/Large Screen
IWB/Projector/Large Screen

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