Sorting into categories
PROCEDURALClassify objects into given categories, count the number in each category, and sort the categories by count
Mastery Evidence
- Sort a set of shapes by colour and count how many in each group
- Sort objects by size (big/small) and state how many in each category
- Identify which category has the most/fewest after sorting and counting
Assessment Prompt
“Can [child] sort a pile of objects — like buttons, coins, or toy animals — into groups and count how many are in each group?”
Curriculum Standards1 alignment
K.MD.3Common Core State Standards for MathematicsClassify objects into given categories; count the numbers of objects in each category and sort the categories by count.
Prerequisites2
- Comparing groups: more or fewersoftAges 4—6
- Counting objects to 20hardAges 5—6
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- Comparing groups: more or fewer soft
Sorting categories by count benefits from ability to compare quantities
- Counting objects to 20 soft
Counting a set helps when comparing groups, but younger children (GB age 4) can compare using matching without formal counting to 20
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Counting objects to 20 hard
Counting objects in each category requires being able to count sets of objects
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
Unlocks4
- Drawing Life Cycle DiagramssoftAges 7—8
- Pictograms and tally chartshardAges 6—8
- Using objects to model real problemssoftAges 5—6
- Sorting Data into CategorieshardAges 6—8