CCSS.Math.Content.1.NBT.A
The standard
Extend the counting sequence.
Common Core State Standards for Mathematics
What this standard means
Students need to count forward past 100, starting from 1 or from a given number. They should read and write numbers to 120, connect spoken number words to written numerals, and count sets of objects accurately.
Mastery looks like a student starting at 47 and counting on without restarting, writing 83 when they hear “eighty-three,” and tracking objects one by one. Common trouble spots are teen numbers, switching decades like 59 to 60, reversing digits, and losing track while counting a group.
Ways to teach it
- Give pairs 120-chart puzzles with missing pieces, and have them place each number while counting aloud from the nearest known number.
- Ask students to write what number comes next after 39, 49, 59, and explain the pattern they notice.
- Say five numbers between 1 and 120, and have students write each numeral on a whiteboard for a quick check.
- Use classroom calendar days or lunch count totals to practice reading, writing, and counting real numbers up to 120.
Plan a lesson for CCSS.Math.Content.1.NBT.A
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Related standards
- CCSS.Math.Content.K.CC.A.1
Count to 100 by ones and by tens.
- CCSS.Math.Content.K.CC.A.2
Count forward beginning from a given number within the known sequence (instead of having to begin at 1).
- CCSS.Math.Content.K.CC.A
Know number names and the count sequence.
- CCSS.Math.Content.2.NBT.A.2
Count within 1000; skip-count by 5s, 10s, and 100s.