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Counting 11 to 20

Why the teens are the hard part

Play this lessonNarrated out loud. No account, works offline.

Also available in Spanish. The app stops after two lessons a day and suggests something to do away from the screen.

What it teaches

These are the lines the lesson comes back to, and the ones a child actually remembers afterwards.

Eleven and twelve are just words.

Teen means a ten is hiding.

Fifteen sounds like fifty. Slow down.

Start anywhere. Not always at one.

How it starts

You can count to ten. Almost every kid can count to ten. And then comes eleven, and everything gets strange for a while. I want to tell you something first, because nobody ever says it. The next ten numbers are genuinely harder than the first ten. It is not you. English cheats here, and I am going to show you exactly where.

How the lesson goes

Reading a teen number

  1. The first digit is a ten
  2. The second digit is the ones
  3. Say the ones, then add teen

The question at the end

What does the teen in sixteen mean?

For the grown-up

Every lesson ends by handing the child something to do off the screen, and telling you what was taught so you can use the same words.

Try this today: Count out loud from twelve to twenty, slowly, and put one finger down for each number. Check that fourteen is really in there.

Then: Ask them to pick a number between ten and twenty and count on from it.

More in Math

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Twenty-four narrated lessons for ages 4 to 9, in English and Spanish. No account, no sign-up, no ads, and nothing your child does in the app ever leaves the device — you can check that yourself with the network tab open. Open the lessons.