Counting looks simple to adults, but a child has to do several things at once: say the numbers in the right order, point to each object once and only once, and keep track of which ones are done.
One-to-one correspondence is the middle piece: one number, one thing. Children often recite numbers well before they can match them reliably to objects, so a skipped toy or a double count isn’t a worry, just a stage.
What the guidance says
Development Matters, the Department for Education’s early years curriculum guidance, describes three- and four-year-olds learning to “say one number for each item in order”, and to know that the last number reached when counting a small set tells you how many there are in total.
That second idea, called the cardinal principle, takes time. Research by Sarnecka and Carey found that many children can count accurately before they understand that the final number answers “how many?”, so it helps to ask the question after you count together.
Why touching and moving helps
Small hands keep track better than eyes alone. When a child moves each object from one side to the other as they count, the counted and uncounted groups stay separate and nothing gets counted twice.
The Education Endowment Foundation’s early maths guidance recommends using objects, pictures and fingers to support children’s thinking and talk. At home, that simply means counting real things.
Counting games to try
- Posting: count coins or buttons into a jar one at a time, so each one makes a little clink.
- Table setting: one plate, one cup, one spoon for each person. Is there one for everyone?
- Egg box or ice tray: put one pom-pom or pasta shape in each hole while counting.
- Stair counting: one number for each step, going up and coming down.
- Clap and count: one clap for each toy in a line, then ask “How many?”
Keep it relaxed
If a number gets skipped, simply count again together, slowly, touching each one. Start with small sets of three to five in a line before trying scattered groups, which are harder. Short, playful moments through the day do more than one long practice session.