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Early Years Maths

Why children count objects twice

Explain common counting errors and practical ways to slow down.

Quick answer

Children often count objects twice because they haven’t yet developed a strong understanding of one-to-one correspondence. This means they may point to the same object more than once or miss some objects entirely. This is a normal part of learning and can be fixed with practice and helpful strategies.

Learning outcome

By the end of this page, you will understand why children sometimes count objects twice and how to help them count more carefully.

Why this matters

Counting is one of the first skills children learn in maths, and it helps them understand how many of something there is. When children count objects twice, it shows they are still learning how to match each object with one number. This skill is important for addition, subtraction, and understanding bigger numbers later on. If you help children count carefully now, they will find maths easier in the future.

How it works

When children count, they must match each object to one number. If they don’t, they might:
  • Point to the same object twice
  • Miss an object
  • Count the same object more than once
This is called a lack of one-to-one correspondence. It's normal for young children to struggle with this at first. Here’s how to help:
  1. Count slowly and clearly
  2. Touch or move each object as you count
  3. Use fingers or counters to help
  4. Repeat the count to check

Examples you can see

Let’s imagine you are counting apples in a basket. Example 1: You have 5 apples. You point to the first apple and say "one", then point to the second and say "two", but then you point to the first apple again and say "one" again. You now think there are 6 apples instead of 5. Example 2: You have 3 toys. You count them and say "one, two, three", but you accidentally skip one toy. Now you think there are only 2 toys. Example 3: You have 4 blocks. You touch each one and say the numbers, but you move your finger too quickly and accidentally touch the same block twice. To help, you can:
  • Use a small number of objects at first
  • Let children touch or move each object as you count
  • Use counters or toys to help keep track

Try it as a mini adventure

Adventure: The Counting Challenge You are on a mission to count all the animals in a zoo! But you must be very careful not to count the same animal twice or miss any.
  1. First, you see 3 zebras. Count them carefully.
  2. Next, you see 4 giraffes. Count them carefully.
  3. Then, you see 2 monkeys. Count them carefully.
  4. Finally, you see 1 elephant. Count it carefully.
Now, add up all the animals. How many animals did you count in total? Answer: 3 + 4 + 2 + 1 = 10 animals

Common mistakes

  • Mistake: Counting the same object twice because the child doesn’t understand that each object is only counted once.
  • Why it happens: Children are still learning how to match each object to one number.
  • Fix: Use a finger or a counter for each object as you count. This helps them keep track.
  • Mistake: Skipping an object because the child gets confused about which one they’ve counted.
  • Why it happens: Children may not have a clear mental picture of what they’ve counted.
  • Fix: Move each object aside as you count, or use a small box to separate counted items.
  • Mistake: Counting objects in a random order instead of going in a line.
  • Why it happens: Children may not yet understand that counting must follow a sequence.
  • Fix: Set up objects in a line or circle and count them one by one from start to finish.

Parent and carer guide

Parents and carers can help children count more carefully by:
  • Using simple, small numbers at first (like 1 to 5)
  • Counting objects together and touching each one
  • Encouraging children to say the numbers slowly and clearly
  • Letting children use their fingers or counters to help
  • Repeating the count to check if it’s correct
What to say: “Let’s count the toys together. Touch each one as we say the number.” What not to worry about: It’s normal for children to count twice at first. Don’t get frustrated – keep practicing!

Practice questions

  1. Count the number of stars below and write the answer: ★★★★★★★
  2. Count the number of bananas below and write the answer: 🍌🍌🍌🍌
  3. Count the number of cars below and write the answer: 🚗🚗🚗🚗🚗
  4. Count the number of birds below and write the answer: 🐦🐦🐦🐦🐦🐦
  5. Count the number of flowers below and write the answer: 🌸🌸🌸🌸🌸🌸🌸🌸
Answers:
  1. 7 stars
  2. 4 bananas
  3. 5 cars
  4. 6 birds
  5. 8 flowers

FAQ

Why do children count the same object twice?

Children may count the same object twice because they are still learning how to match each object to one number. This is a normal part of learning to count.

How can I help my child count better?

You can help by using small numbers, touching or moving each object as you count, and using fingers or counters to keep track.

Is it normal for children to make counting mistakes?

Yes, it is normal for children to make mistakes when counting at first. These mistakes help them learn and grow.

What age do children usually get better at counting?

Most children get better at counting between ages 3 and 5. By age 6, most children can count accurately to 20.

How can I make counting more fun for my child?

You can make counting fun by counting objects in everyday life, like toys, snacks, or steps. You can also play counting games or sing counting songs.