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Mastering Number

At Trinity we follow the Mastering Number program as part of our maths learning in EYFS and KS1. Mastering Number aims to secure firm foundations in the development of good number sense for all children. The aim over time is that children will leave KS1 with fluency in calculation and a confidence and flexibility with number. 


Below are some videos to teach you all about the words we use in our maths mastery learning!


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The children are taught to subitise numbers. They are able to look at a small group of numbers, and immediately know how many there are without having to count.

Counting Rules

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We have counting rules that help us to make sure that we count accurately.

Counting Rules!

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1. Point: Point to each object as you count it.
2. Move: Sometimes we can't do this, but if we can, we put the objects into a line so we can clearly see them.
3. Count out loud: Say the number out loud as we count.
4. One number at a time: Only say one number as we point to each object.

If we follow all these rules we will be careful counters!

Number bonds!


In Mastering number we look carefully at all of the different ways numbers can be composed. 

Number bonds to 2

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Number bonds to 3

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