### Counting objects up to 20

In this lesson, we you will count up to 20 objects and look at the order of numbers to 20 on a number line.

Skip navigation# Unit Overview: Numbers within 20

## Lessons:

### Counting objects up to 20

### Ordering numbers up to 20

### Developing a sense of 10

### Exploring place value

### Finding one more than a number to 20

### Finding one less than a given number

### Exploring one more and one less

### Investigating number combinations within 20

### Review lesson: A maths meeting!

### Patterns and ordinal numbers

10 lessons

In this lesson, we you will count up to 20 objects and look at the order of numbers to 20 on a number line.

In this lesson, we will place number cards to 20 in order to create a number line.

In this lesson, we will sort your objects and compare the groups of objects.

In this lesson, we will explore place value using objects. We will use a tens frame to place objects and to help count them. The main focus of the learning should be on practising counting and placing objects accurately.

In this lesson, we will play a game to develop understanding of one more than.

In this lesson, we will use a number grid and objects to find one less than a given number within 20.

In this lesson, we will practise their knowledge of one more and one less by playing a game with a coin and building blocks.

In this lesson, we will share in different ways and answer the questions: How can you share equally and unequally? What do you notice about the number combinations?

In this lesson, we will refresh and practice some of the maths learning we have covered in the previous sessions. We will revise and order months of the year, days of the week, counting objects and ordinal numbers.

In this lesson, we will create a repeating pattern using colouring pencils and notice the order in which the colours appear.

Units in Maths

- Early Mathematical Experiences
- Pattern and Early Number
- Numbers within 6
- Addition and subtraction within 6
- Measures
- Shape and sorting
- Calendar and Time
- Numbers within 10
- Addition and subtraction within 10
- Numbers within 15
- Grouping and Sharing
- Numbers within 20
- Doubling and halving
- Shape and pattern
- Addition and subtraction within 20
- Money
- Measures
- Depth of numbers within 20
- Numbers beyond 20

- Doubling and halving
- Addition and subtraction within 10
- Exploring calculation strategies within 20
- Money
- Measures
- 2-D shape, perimeter and area
- Numbers to 50
- Manipulating and calculating with fractions
- Fractions
- Fractions and decimals
- Conceptualising and comparing fractions
- Numbers 50 to 100 and beyond
- Reasoning with large whole numbers
- Converting units of measure
- Numbers to 10
- Solving measure and money problems
- Addition and subtraction within 20
- Addition and subtraction (applying strategies)
- Numbers within 1000
- Place value
- Problem solving with integer addition and subtraction
- Volume
- Positive and negative numbers
- Numbers within 10
- Numbers within 15
- Addition and subtraction within 20
- Measures (1): Length and mass
- Measures (2): Capacity and volume
- Addition and subtraction of 2-digit numbers
- Fractions
- Multiplication and division
- Multiplication and division
- Axioms and arrays
- Prime factor decomposition
- Indices and standard form
- Time
- Addition and subtraction of 2-digit numbers (regrouping and adjusting)
- Area and perimeter
- Numbers and numerals
- Percentages
- Fractions
- Measures: Length
- Numbers beyond 20
- Time
- Securing multiplication facts
- Addition and subtraction within 10
- Measures: Mass
- Number sense and exploring calculation strategies
- Addition and subtraction
- Securing multiplication and division
- Position and Direction
- Pattern and Early Number
- Addition and subtraction word problems
- Fractions
- Decimals
- Multiplication and division: 3 and 4
- Multiplication and division: 2, 5 and 10
- Measures: Capacity and volume
- Addition and subtraction
- Extending calculation strategies and additive reasoning
- Deriving multiplication and division facts
- Calculating with whole numbers and decimals
- Integers & Decimals
- Multiplication and division
- Grouping and Sharing
- Surds and trigonometry
- Numbers within 6
- Numbers within 100
- Exploring calculation strategies
- Time
- Exploring calculation strategies and place value
- Multiplication and division
- Factors and multiples
- Graphs
- Graphs
- Reasoning with 4-digit numbers
- Reasoning with patterns and sequences
- Calculation problems
- Numbers within 20
- Money
- Multiplication and division
- Fractions, decimals and percentages
- Decimals and measures
- Early Mathematical Experiences
- Order of operations
- Depth of numbers within 20
- Numbers to 20
- Addition and subtraction within 20 (comparison)
- Addition and subtraction within 6
- Accuracy and estimation
- Money
- Length and perimeter
- Fractions
- Fractions
- Problem solving with whole numbers and decimals