Maryland Math K.NOS.C.10

MathKindergartenNumber and Operation Sense

The Standard

Compare two quantities within 20 using greater than, equal to, or less than, with objects, location on number paths, and written numerals.

Maryland College and Career Ready Standards for Mathematics (2025) · DEVELOP FOUNDATIONS FOR PLACE VALUE.

Teacher's field guide

What Students Need to Do: Students count two groups of up to 20 objects and tell which has more or whether they have the same amount. They use a number path and written numerals to check their comparison.
What Mastery Looks Like: A student can compare 14 and 17 counters, then point to both numbers on a number path and say, “14 is less than 17.” They can also recognize that two groups of 14 are equal, even if one group is spread out.
Common Misconceptions: Students may think a spread-out group has more objects than a close-together group. They may say 19 is greater than 20 because 9 is greater than 0, or think numbers farther left on a number path are greater.
How to Assess It: Give each student 12 counters, 15 counters, and a 0 to 20 number path. Ask them to mark both numbers on the path and complete: “12 is ___ than 15.”

Lesson moves

Build groups of 14, 17, and 14 counters, pair the counters in two groups at a time, and name which groups have more, fewer, or the same.
Mark 9 and 12 on a 0 to 20 number path and explain in writing which is greater and how the path shows it.
Play numeral-card showdown: partners draw cards from 0 to 20, place both numbers on a path, and say a correct comparison.
Set out cups holding 13 and 16 crayons, then ask students which cup has more and to write the matching numeral comparison.

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