Kindergarten Fall Math — Counting to 100, Subitizing, Cardinality, Shapes, and Pattern
Lesson 11 25 min math.gK.f.lesson_11

Sort and classify — by one attribute

Skills targeted
Objectives
  • Students can sort a collection of attribute blocks into 2-4 categories by one chosen attribute (color, shape, or size).
  • Students can articulate the sorting rule used and count the objects in each category.
Vocabulary
sortclassifycategoryattributerule

Lesson plan

Warm-up

5 min

Sorting game: teacher holds up 6 mismatched items (red apple, blue cup, red car, blue book, red shoe, blue pen). Asks: 'how could we sort these?'

Teacher moves
  • Elicit multiple sorting rules: by color (red vs. blue), by what-they-are (toys vs. things-we-use), etc.
  • 'There's not just one way to sort — but we pick ONE RULE at a time.'

Direct instruction

8 min

Today we sort like mathematicians. We pick ONE rule and follow it. Watch.

Key examples
  • Now we COUNT each hoop. 4 red, 5 blue, 3 yellow.
    model 'I picked COLOR. Now every red block goes in this hoop, every blue in that hoop, every yellow in the last.'
    prompt Demonstrate with 12 attribute blocks: pick rule 'by color' — sort into 3 hoops (red, blue, yellow).
  • The blocks didn't change — but the GROUPS changed because the RULE changed.
    model 'Same blocks, different rule. Now circles together, triangles together, squares together.'
    prompt Same 12 blocks — re-sort by SHAPE.
Checks for understanding
  • What was our rule? (color, then shape)
  • How many were red? (4)
Media
M-K-F-DS-11-A Chart Physical / non-image

24"x18" anchor chart titled 'SORTING — PICK ONE RULE.' Top row: 3 hoops drawn (red border, blue border, yellow border) with attribute blocks sorted by color inside. Middle row: same 3 hoops re-labeled by shape (circle, triangle, square) with the same blocks re-sorted. Bottom: large text '1 rule = 1 sort. Want a new sort? Pick a new rule.' Decorative arrow showing 'change rule' between rows.

Guided practice

7 min
Tasks
  • Group work (4 children): pick a rule, sort all 60 attribute blocks into hoops. Then re-sort by a different rule.
    scaffold Each group has 3 sort-label cards (COLOR / SHAPE / SIZE) to choose from.
  • Each group reports out: 'We sorted by ___. We have ___ in this group.'
Media
M-K-F-DS-11-B Photograph
Top-down photograph of a kindergarten desk: 4 hula hoops arranged in a square, each with sort-label card ('RED' / 'BLUE'

Top-down photograph of a kindergarten desk: 4 hula hoops arranged in a square, each with sort-label card ('RED' / 'BLUE' / 'YELLOW' / 'GREEN'). Attribute blocks (~60) scattered between hoops being sorted by 4 children's hands of varied skin tones. Bright daylight, blocks crisply in focus. Used as a 'this is what your sort should look like' reference.

Formative assessment

2 min
Exit ticket
  • In math journal, draw 3 hoops and 6 objects sorted into them. Write one word for the sorting rule.
scoring Coherent sort + rule stated = mastery snapshot; sort coherent but rule unstated = practicing; mixed-rule sort = reteach

Closure

Moves
  • Preview: 'Tomorrow we start patterns!'

Homework

5 min
Tasks
  • At home, sort your socks (or LEGO, or stuffed animals) into 2 groups by one rule. Tell a grown-up your rule.

Exercises in this lesson

math.gK.f.ds.sort_classify.ex_01
Sort these 12 attribute blocks into hoops by ONE rule. Tell me your rule. Then count how many in each hoop.
 sort into hoops · diff 2
math.gK.f.ds.sort_classify.ex_02
You sorted by color. Now RE-SORT the same blocks by SHAPE. Show me your new groups.
 re sort by new rule · diff 3

Differentiation

Scaffolds
  • Pre-labeled hoops
  • Limit to 2 categories (e.g., red vs. not-red)
Extensions
  • Sort by TWO attributes (e.g., red AND large) — uses Venn-diagram overlap
  • Make a bar-graph stamp showing the category counts
English Learners
  • Sort label cards bilingual
  • Sentence frame 'I sorted by ___. I have ___ in this group.'
Ieps 504s
  • Pre-sorted starting pile
  • Reduce to 2 categories only

Teacher notes

Sorting is the K root of data and statistics. The cognitive move is 'I pick a rule and apply it consistently' — which is also the root of classification in biology and the conditional logic of programming. Watch for children who can't re-sort the same collection by a new rule (rigid attribute focus, sometimes a sign of cognitive inflexibility — gently scaffold rather than push). Re-sort is the higher-order move; sort-once is the floor.