Georgia K.NR.3

K.NR.3 is a Georgia mathematics standard. These are the expectations under it.

• K.NR.3.1

  Describe numbers from 11 to 19 by composing (putting together) and decomposing (breaking apart) the numbers into ten ones and some more ones.

01

What Students Need to Do

Students build teen numbers using one group of ten and extra ones. They break a teen number into 10 and its leftover ones, using objects, drawings, or equations.

02

What Mastery Looks Like

Given 17 objects, a student groups ten and explains that 17 is 10 and 7 more. Given one ten and 3 ones, the student names and writes 13.

03

Common Misconceptions

Students may read 14 as 1 and 4 separate objects or write 14 as 1 + 4. They may reverse the digits or count every object instead of recognizing a group of ten.

04

How to Assess It

Exit ticket: Draw 16 as one group of ten and extra ones, then complete 16 = 10 + ___.

1. 01

   Give students linking cubes to build 14, connect ten cubes, leave four loose, and record 14 = 10 + 4.

2. 02

   Show 18 counters and ask, “How can you organize these so someone can see 18 without counting every counter?”

3. 03

   Play Teen Number Match with cards showing numerals, ten-frames, cube trains, and equations such as 10 + 6.

4. 04

   Set up a pretend bakery where students pack ten muffins in a box and place extra muffins beside it to show each order.

• 4.NR.1.3

  Use place value reasoning to represent, compare, and order multi-digit numbers, using >, =, and < symbols to record the results of comparisons.

• 4.NR.1.4

  Use place value understanding to round multi-digit whole numbers.

• 3.NR.1

  Use place value reasoning to represent, read, write, and compare numerical values up to 10,000 and round whole numbers up to 1,000.