Teen Numbers in IB PYP Grade 1 Mathematics
Teen numbers from 11 to 19 are a ten and some more ones. Seeing 13 as 10 + 3 on a ten frame is the first big step toward understanding place value in Grade 1.
PYP learning is inquiry-based, so every worksheet here is short, colourful and playful, with a friendly animal guide and a teacher answer key on page 2.
What learners practise
- Seeing 13 as 10 + 3 on ten frames
- Splitting teen numbers
- Reading teen number words
- Drawing teen numbers
Teen numbers at a glance
- 13 = 1 ten + 3 ones = 10 + 3
- Ten frame: one full frame and some counters
- Words: thirteen, fourteen ... nineteen
- 20 = 2 tens and 0 ones
For students
Read each instruction carefully, try every question and colour the animal when you finish.
For parents
Print on A4, read the instructions aloud together and let your child work alone before you check.
For teachers
Use a worksheet as a starter, homework or exit ticket. Each one has a name, class and date box and an answer key.
Always fill the first ten frame completely, then put the extra counters on a second frame. This shows children that teens are a full ten and some ones.
Quick answers
Who is the Teen Numbers page for?
It is for IB PYP Grade 1 Mathematics learners, typically aged 6–7, and for the parents and teachers who support them.
Why are teen numbers so tricky?
Their names do not say ten and ones the way twenty-three does, so children need ten frames and blocks to see the structure.
What comes after the teens?
Twenty and then the two-digit numbers, where tens and ones are written in two places.
How should I use these worksheets?
Pick one worksheet, let your child try it without help first, then check together with the answer key on page 2. Short sessions of five to ten minutes, a few times a week, work best.
Keep exploring
Place Value 
Ones 
Tens