🔢 Mathematics · Counting & Cardinality

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)

Typical age: 5–6 years

“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?”

0 / 3 mastered

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Needs first

How Many in Total?REQUIRED
Answering 'how many?' requires the cardinality principle
One-to-one countingREQUIRED
Counting objects to answer 'how many?' requires one-to-one correspondence

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Hands-On Problem Solving
Counting objects requires choosing appropriate tools (cubes, ten frames)
Comparing groups: more or fewer
Counting a set helps when comparing groups, but younger children (GB age 4) can compare using matching without formal counting to 20
Sorting into categoriesREQUIRED
Counting objects in each category requires being able to count sets of objects