Maryland Math K.NOS.A.5

MathKindergartenNumber and Operation Sense

The Standard

Represent a number of objects with a written numeral within 20 (with 0 representing a count of no objects).

Maryland College and Career Ready Standards for Mathematics (2025) · KNOW NUMBER NAMES AND THE COUNT SEQUENCE.

Teacher's field guide

What Students Need to Do: Students count up to 20 objects, touching or moving each one once. They write the numeral that shows how many there are. They write 0 for an empty group.
What Mastery Looks Like: A student can count 13 counters and write 13 without copying it. They can also look at an empty mat and write 0.
Common Misconceptions: Students may skip an object or count one twice, then write a numeral that does not match. They may write 14 as 41 or leave an empty group blank instead of writing 0.
How to Assess It: Put 17 counters on one mat and leave a second mat empty. Ask students to count each mat and write its numeral beneath it.

Lesson moves

Give pairs 18 buttons and a blank card; have them move each button as they count, then write the total on the card.
Show a picture of 12 apples and ask, 'What numeral shows how many apples there are? How did you check?'
Place dot cards showing 0 to 20 dots face down; students flip one, count, and write the numeral on a whiteboard.
Ask students to count the napkins set out for snack and write the total on a sticky note beside the stack.

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