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Subitising

Subitising

When you’re playing a game with dice, do you need to count the dots to know what number you have rolled? Of course not! You have recognised the number instantly! This is subitising. Below, we explain what subitising is, why it’s important, and how you can help your child at home.

What is ‘subitising’?      Subitising is a term that was introduced by the Swiss psychologist Piaget. It’s the ability to look at a small number of objects and instantly recognise how many objects there are without needing to count.

In early years, children look at tally marks, how many fingers are being held up or the dots on dice to help develop this skill.

There are two types of subitising: perceptual and conceptual. Our brains can only easily subitise numbers up to five – this is perceptual subitising. Anything above five is conceptual subitising. This is because the numbers then start to relate to a larger quantity of things and identifying ‘how many’ without counting becomes more difficult.

Why is it important?

Subitising is essential for children’s mathematical development for many reasons:

  • Subitising helps children to understand what numbers mean or how many ‘things’ a number refers to.
  • It can develop children’s pattern recognition.
  • Children can over-rely on counting.

How can I help at home?

  • You don’t need to spend lots of money to help your child with subitising. Here are a few ideas:
  • Board games with dice are a great way to have fun and sneak some subitising in! Give your child a number and ask them to show you the number using their fingers. To make this harder, ask them to show you in different ways.
  • For example, five can be represented by five fingers on one hand or three fingers on one hand and two fingers on the other.
  • Make some flashcards that show dot patterns, tally marks and fingers being held up (if you are feeling creative!). Can your child tell you how many there are without counting? To make this harder, show them a flashcard for only a few seconds and then hide it! This encourages them to subitise rather than count. The snowflakes pictures we have sent can be cut up and made into flashcards.
  • Throw a small number of counters in two different colours on the table and ask your child to say what they see. For example, “I see three red counters and two yellow counters. There are five counters altogether”. You don’t have to use counters either – there are plenty of alternatives that would suffice!

This is a game they can play, posting the fish into the penguin if you say a number they choose that fish.

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