Mathematics Counting & Cardinalityusually ages 5–6

Counting objects to 20

Count a set of objects to answer 'how many?' for sets up to 20 (arranged in lines, arrays, circles, or scattered)

How to tell they’ve got it

Tick these off as you see them — no test required.

Accurately count up to 20 objects in a line
Count up to 10 scattered objects without losing track
Given a number 1–20, count out that many objects from a larger set

🖨 Print this page to keep the checklist — it prints beautifully.

Try this together

If you spread out 15 buttons on the table in a random arrangement and ask your child how many there are, can they count them all carefully and give you the right answer?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

How Many in Total?ages 4–6Answering 'how many?' requires the cardinality principle

One-to-one countingages 4–6Counting objects to answer 'how many?' requires one-to-one correspondence

Counting objects to 20this skill · ages 5–6

Unlocks

Sorting into categoriesages 5–6Counting objects in each category requires being able to count sets of objects

Comparing groups: more or fewerages 4–6Counting a set helps when comparing groups, but younger children (GB age 4) can compare using matching without formal counting to 20

Hands-On Problem Solvingages 5–6Counting objects requires choosing appropriate tools (cubes, ten frames)

solid = must come firstdashed = helps

Curriculum alignment

Candidate matches to official curriculum codes — machine-suggested, unreviewed (v0.1).

Show candidate curriculum codes · 3 ACARA · 1 NSW · 3 VIC

Australian Curriculum v9 candidate

AC9MFN03medium confidenceFoundation · Number

quantify and compare collections to at least 20 using counting and explain or demonstrate reasoning

AC9MFN02medium confidenceFoundation · Number

recognise and name the number of objects within a collection up to 5 using subitising

AC9M1N03medium confidenceYear 1 · Number

quantify sets of objects, to at least 120, by partitioning collections into equal groups using number knowledge and skip counting

NSW syllabus codes & stages only

MAE-RWN-02low confidenceMathematics K-10 · Early Stage 1

Victorian Curriculum 2.0 codes & levels only

VC2MFN03medium confidenceMathematics · Foundation · Number strand

VC2MFN02medium confidenceMathematics · Foundation · Number strand

VC2M1N03medium confidenceMathematics · Level 1 · Number strand

These are candidate alignments generated by semantic matching — machine-suggested and unreviewed (v0.1), not official or verified mappings. For official curriculum content see australiancurriculum.edu.au, curriculum.nsw.edu.au and f10.vcaa.vic.edu.au. Don’t rely on them for registration or compliance purposes.

Nearby on the map

Counting in 2sages 5–7 Rote counting to 100ages 5–6 Two written numerals between 1 and 10ages 5–6 Comparing groups: more or fewerages 4–6

All Counting & Cardinality skills →