Montana Math MT.K.MD.3
The Standard
Classify, count, and sort objects into categories. This standard should incorporate cultural context relating to Montana Indigenous Peoples and local communities.
2026 Montana Mathematics Content Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students put objects into groups using one rule, such as color or shape. They count the objects in each group and explain where each object belongs.
What Mastery Looks Like
- A student sorts a set of picture cards into clear groups and counts each group accurately. They can name their sorting rule and sort the same cards again using a different rule.
Common Misconceptions
- Some children switch rules halfway through, sorting one pile by color and another by size. Others skip an object or count it twice after moving it between groups.
How to Assess It
- Give each child eight paper shapes in two colors and two shapes. Say, "Make groups using one rule. Count each group and tell me your rule."
Lesson moves
Ways to Teach It
Give pairs 12 paper shapes in two colors and sizes; have them choose one rule, make piles, and count each pile.
Show a pile of classroom supplies and ask, "How could we group these, and where would the pencil go?"
Play Guess My Rule with six picture cards; one child sorts them while a partner names the rule and checks the counts.
Print public photos of buildings and outdoor spaces from a Montana tribal community and your town; sort by place type, then count.
Free download
Printable MT.K.MD.3 Worksheet
A ready-to-print activity worksheet aligned to MT.K.MD.3, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
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