Count One to Twenty
Balloon Festival — Count to Twenty!
Twenty colorful balloons are waiting!
Practice to hear each number, or Exercise to pop them in order.
Introduction
Extend your counting skills from 10 to 20, learning the pattern of teen numbers. Pop every balloon in order and you'll have counted all the way to twenty!
The Teen Numbers (11–19)
Numbers 11 through 19 are called "teen" numbers. They are formed by combining ten with a unit: eleven (10+1), twelve (10+2), thirteen (10+3), fourteen (10+4), fifteen (10+5), sixteen (10+6), seventeen (10+7), eighteen (10+8), nineteen (10+9). 20 is the first two-digit multiple of ten.
Balloon Festival — Pop the Balloons!
Twenty colorful balloons are floating in the sky — one for each counting number. In Practice mode the balloons pop in order while you hear each number spoken aloud. In Exercise mode, pop the balloons yourself in the correct order: 1, 2, 3 … all the way to 20. Can you pop every balloon without making a mistake?
Quick practice
Answers stay in this session until XP and mastery sync to your profile.
What number comes after 13?
Which number comes between 16 and 18?
Fill in the blank: 11, 12, 13, ___, 15
How do you write "seventeen" as a digit?
True or False: 20 is the largest two-digit number you learn when counting to twenty.
What number comes before 20?
For the full tabbed flow with scoring summary, open the Practice tab above.