Georgia K.NR.2

K.NR.2 is a Georgia mathematics standard. These are the expectations under it.

• K.NR.2.1

  Count forward to 100 by tens and ones and backward from 20 by ones.

• K.NR.2.2

  Count forward beginning from any number within 100 and count backward from any number within 20.

01

What Students Need to Do

Students say number names in order from a given starting number, rather than always beginning at 1. They continue in either direction and identify what comes just before or after a number.

02

What Mastery Looks Like

A student can start at 46 and say the next ten numbers in order. The student can also start at 63 and say the previous ten numbers, including across a decade.

03

Common Misconceptions

Students may skip numbers in the teens or repeat a number. They often struggle at decade changes, such as moving from 39 to 40 or from 50 to 49.

04

How to Assess It

Ask each student to count from 58 to 66, then from 42 to 34. Note any skipped, repeated, or out-of-order numbers.

1. 01

   Give pairs numeral cards and a floor number line. One student chooses a start card, and the other moves a counter forward or backward.

2. 02

   Ask, "What happens to the ones digit when we count past 29 or back from 40?" Partners explain using a hundred chart.

3. 03

   Play Number Chain. Name a starting number and direction, then students take turns saying one number until someone reaches the target.

4. 04

   Run a classroom countdown from 30 before cleanup, then count forward as 10 objects are returned to their places.

• 2.NR.1.2

  Count forward and backward by ones from any number within 1000. Count forward by fives from multiples of 5 within 1000. Count forward and backward by 10s and 10...

• 1.NR.1

  Extend the count sequence to 120. Read, write, and represent numerical values to 120 and compare numerical values to 100.