# 1.NBT.A.1

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.

## Summary:

This particular standard expands on students’ previous knowledge of basic counting skills. Students should recognize, read, and write numerals within 120 as well as count on in a variety of sequencing patterns starting anywhere in that range. Students should represent a given number of objects with a numeral within the 120 range.

## Understanding the Standard:

• Provide students with opportunities to count on by ones, and then to skip-count by more difficult sequences (by 2’s, 5’s, 10’s), starting at any number less than 120.
• Provide students with problems/opportunities to count to 120 starting at any number less than 120.
• Provide students with opportunities to practice reading and writing numerals.
• Provide students with opportunities to communicate their reasoning for solutions through verbal and written explanations as well as visuals and drawings.
• Provide students with the use of manipulatives and technologies which offer more concrete exploration of counting and sequence expansion.
• Provide problems/opportunities for students to match numerals with picture representations, and to represent a number of objects with a numeral.

## Questions to Focus Instruction:

• Can students recognize, read, and write numerals to 120?
• Can students count fluently to 120 beginning at any number less than 120?
• Can students represent a group of objects with a numeral (up to 120)?
• Can students recognize different representations (e.g., number names, base ten model, digits, or picture representation) of numerals through 120?
• Can students explain and defend their choices and reasoning?

## Skills

Prior to: Students should be able to count fluently to 25, as well as recognize the word forms of these numbers. Because there is a large jump in expectations from Kindergarten to First Grade, teachers are encouraged to move their students beyond 25 as soon as possible in increments of fives and tens. Prior knowledge and practice with a variety of skip counting sequences is also necessary. Go to K.CC.A.3 to see previous skills in this progression.

At Grade Level: Students can count, recognize and extend sequencing patterns up to 120. They can represent the number with pictures, drawings, and concrete models.

Moving Beyond:
Students will be expected to count in a variety of sequences to 1,000. They will recognize and read the number name and digit form of these numbers, as well as model them with concrete objects, such as base 10 models. Go to 2.NBT.A.3 to see the progression of related skills.