CCSS.Math.Content.K.CC.C.6
The standard
Identify whether the number of objects in one group is greater than, less than, or equal to the number of objects in another group, e.g., by using matching and counting strategies.
Common Core State Standards for Mathematics · Counting and Cardinality
What this standard means
Students compare two groups of objects and tell which group has more, fewer, or the same number. They should use one-to-one matching, counting, or visual grouping, not just guess from how spread out the objects look.
Mastery looks like a child lining up or pairing objects, counting both sets accurately, and explaining the comparison with words like more, fewer, same, greater, less, or equal. Common trouble spots are counting objects twice, skipping objects, being fooled by spacing, and thinking the longer row always has more.
Ways to teach it
- Hands-on: Give partners two cups of counters, have them build two rows, match pairs, then say which group has more, fewer, or the same.
- Prompt: Show two messy groups of dots and ask, “How can you prove which group has more without just looking?”
- Quick assessment: Place 7 cubes and 5 cubes on a mat and ask the student to compare them using matching or counting.
- Real-world connection: Compare snack piles, crayons, or line leaders and ask, “Does each person have one, or does someone have extra?”
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Related standards
- CCSS.Math.Content.K.MD.B
Classify objects and count the number of objects in each category.
- CCSS.Math.Content.2.OA.C.3
Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to expr...
- CCSS.Math.Content.K.MD.B.3
Classify objects into given categories; count the numbers of objects in each category and sort the categories by count.
- CCSS.Math.Content.K.MD.A.2
Directly compare two objects with a measurable attribute in common, to see which object has "more of"/"less of" the attribute, and describe the difference.