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One-to-one counting
CONCEPTUALOne-to-one correspondence when counting objects: each object is paired with exactly one number name
Mastery Evidence
- Point to or touch each object exactly once while saying number names
- Do not skip objects or double-count when counting a set
- Recognise an error when someone counts an object twice
Assessment Prompt
“If [child] is counting a pile of grapes, do they touch or point to each one exactly once as they say each number — without skipping any or counting the same one twice?”
Curriculum Standards2 alignments
K.CC.4Common Core State Standards for MathematicsRelationship Between Numbers and Quantities
Understand the relationship between numbers and quantities; connect counting to cardinality.
Counting and Cardinality
K.CC.4.aCommon Core State Standards for MathematicsOne-to-One Correspondence
When counting objects, say the number names in the standard order, pairing each object with one and only one number name and each number name with one and only one object.
Counting and Cardinality
Prerequisites0
No prerequisites — this is a foundational topic.
Unlocks3
- How Many in Total?hardAges 4—6
- Rote counting to 100hardAges 5—6
- Counting objects to 20hardAges 5—6