• Mastery PD Materials

Composition of numbers: 0–5

Spine 1: Number, Addition and Subtraction – Topic 1.3


Apply the partitioning structure to the numbers to five, and introduce children to new concepts such as subitising, ordinality and the bar model.

Teaching points

  • Teaching point 1: Numbers can represent how many objects there are in a set; for small sets we can recognise the number of objects (subitise) instead of counting them.
  • Teaching point 2: Ordinal numbers indicate a single item or event, rather than a quantity.
  • Teaching point 3: Each of the numbers one to five can be partitioned in different ways.
  • Teaching point 4: Each of the numbers one to five can be partitioned in a systematic way.
  • Teaching point 5: Each of the numbers one to five can be partitioned into two parts; if we know one part, we can find the other part.
  • Teaching point 6: The number before a given number is one less; the number after a given number is one more.
  • Teaching point 7: Partitioning can be represented using the bar model.
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