One-to-one counting
One-to-one correspondence when counting objects: each object is paired with exactly one number name
What a learner can do afterwards
- Point to or touch each object exactly once while saying number names
- Do not skip objects or double-count when counting a set
- Recognise an error when someone counts an object twice
The lesson
When you count, every thing gets exactly one number. Touch it, say the number, move on.
Tap each star and count out loud.
Try it together
Leo counts his apples. He touches each apple one time and says 1, 2, 3, 4. Four apples.
Tap each apple and count out loud.
Good to know
If you touch a thing twice, it gets two numbers, and the count comes out wrong. One touch, one number.
One thing, one number. Never skip, never count twice.
Watch it
Where it sits
Learn first
Nothing; this is a starting point.
Then practise
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.