Mastering Number

The Mastering Number Programme has been developed by the National Centre for Excellence in the Teaching of Mathematics (NCETM). It aims to secure firm foundations in the development of good number sense for all children from Reception through to Year 1 and Year 2.

The intention is that children will leave KS1 fluent in addition and subtraction number facts and confident to use their knowledge flexibly.

Mastering Number sessions are inclusive with all children securing the same learning point in an interactive and engaging manner. Pupils are encouraged to become mathematically observant, look for relationships, make connections with prior learning and communicate their mathematical ideas.

Within the programme children use a variety of resources, representations and models that help develop their sense of number. They explore subitising and investigate how a number can be composed of two or more smaller numbers. The programme also uses the engaging Numberblocks children’s TV series animations to support the key teaching points.


Subitising - How many without counting?



Rekenrek - This is a manipulative that children use to build numbers.

Over time children are able to visualise numbers.


Representations - children use a variety of representation to support their understanding.

Tens Frame

Hungarian Dice Frame

Lots more!