To teach you child to learn to count numbers by three (3, 6, 9, 12, 15).


At the end of the lesson your child will be able to count to 15 in multiples of 3.

Download the counting by threes worksheet

Time requirement

20 minutes.

Grade level

Kindergarten and first grade.

Introductory activity

  1. Have your child bring you 15 objects of the same type. Examples include: 15 coins, 15 pebbles, 15 stuffed toys, 15 figurines.
  2. Sit down with your child and show him or her how to group objects into threes. Group all 15 objects into sets of three.
  3. Together with your child, count the objects group by group… 3, 6, 9, 12, 15.


If your child or student has learned how to count by threes, gather some more objects and teach them to count by threes to a higher number, such as 30 or 45.

Reinforcement activity

Print out the attached Counting by Threes worksheet. Ask your child to complete the worksheet by themselves. Tell them they must join the dots in the picture by counting by threes – have them read the numbers aloud as they complete the activity.


In order to see if your child has achieved the goal of this lesson, ask them to count from 0 to 15 by threes.