CCSS.Math.Content.K.CC.A

MathKCounting and Cardinality

The standard

Know number names and the count sequence.

Common Core State Standards for Mathematics

What this standard means

Students need to say number names in order, starting at 1 and moving forward without skipping or repeating. They should also begin to count on from a given number, not always restart at 1.

Mastery looks like steady oral counting, matching spoken numbers to the count sequence, and noticing when a number is missing or out of order. Students often get stuck around the teen numbers, say “eleventeen,” reverse 13 and 30, or lose track when asked to start counting from a number other than 1.

Ways to teach it

  • Hands-on activity: Give students number cards 1 to 20 and have them build a floor number line, then walk and count aloud.
  • Discussion prompt: Ask, “What number comes next after 14, and how do you know?” while pointing to a class number chart.
  • Quick assessment: Say a starting number, such as 7, and ask each child to count the next five numbers aloud.
  • Real-world connection: Count daily routines aloud, such as steps to the carpet, crayons in a box, or students in line.

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Related standards

Standard text verified against corestandards.org on July 10, 2026.

Page updated July 10, 2026.

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