### Introduction

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.