CCSS.Math.Content.1.NBT.A.1
The standard
Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.
Common Core State Standards for Mathematics · Number and Operations in Base Ten
What this standard means
Students need to count forward to 120, not just from 1. They should start at numbers like 37, 58, or 109 and keep the sequence going. They also need to read numbers to 120, write them correctly, and match a set of objects to the right numeral.
Mastery looks like counting without restarting at 1, reading two and three digit numbers, and writing numerals in order. Students often get stuck after a decade number, like 49 to 50, or reverse digits, like writing 41 for 14.
Ways to teach it
- Give pairs 120 charts with missing numbers, and have them fill blanks using counters to mark the counting path.
- Ask, “If I start at 86, what numbers come next, and how do you know when the tens digit changes?”
- Say a start number, then have students write the next five numbers on mini whiteboards.
- Use classroom supplies, like 73 crayons or 112 connecting cubes, and have students count, label, and check the total.
Plan a lesson for CCSS.Math.Content.1.NBT.A.1
Generate a complete lesson plan aligned to this standard, with objectives, activities, and materials. Free, no account needed.
Related standards
- CCSS.Math.Content.K.CC.A.1
Count to 100 by ones and by tens.
- CCSS.Math.Content.K.CC.A.3
Write numbers from 0 to 20. Represent a number of objects with a written numeral 0-20 (with 0 representing a count of no objects).
- CCSS.Math.Content.2.NBT.A.3
Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
- CCSS.Math.Content.2.NBT.A.2
Count within 1000; skip-count by 5s, 10s, and 100s.