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Mastering Number at Reception and KS1

What is involved?

This project 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 aim over time is that children will leave KS1 with fluency in calculation and a confidence and flexibility with number. Attention will be given to key knowledge and understanding needed in Reception classes, and progression through KS1 to support success in the future.

Teachers will be expected to contribute regularly to local online Work Group activity, led by the Work Group Lead, reflecting on the implementation and impact of the programme, from autumn term 2024 to summer term 2025.


Participants in the project will engage in all online professional development, including:

  • 3 national live online sessions (in the autumn 2024, spring 2025 and summer 2025 terms)

  • 3 local Work Group sessions (in the autumn 2024, spring 2025 and summer 2025 terms)

Lead Teachers will be provided with teaching materials to be used in Reception, Year 1 and Year 2, and are expected to use these resources and work with children 5 days per week, to develop children’s deep understanding and confidence of additive relationships. They will also be expected to support colleagues in their own year group to use the materials effectively, and work collaboratively to use the resources with all Reception, Year 1 and 2 classes.

Lead Teachers will also be expected to engage with teachers from other schools through a local online community to reflect on their practice and the progress of their pupils. 

The short videos below give a flavour of Mastering Number happening with different age groups. The teachers explains how the programme has benefited all pupils in their classes, providing firm foundations for later work in maths.

Interview: The impact of Mastering Number
Interview: Experience of Mastering Number

Who can take part?

Lead participants from Work Group schools will be three teachers  - one each from Reception, Year 1 and Year 2 – known as Lead Teachers. Some support will also be given to subject leaders and headteachers. Where appropriate, Lead Teachers are expected to support the other teachers in their year group. Lead Teachers in schools will also contribute to an online community to share practice and engage in critical reflection.


This programme and its Work Groups are open to all schools that have not yet engaged with the Mastering Number Programme.

What will you learn?

  • Your pupils will develop and demonstrate good number sense

  • You will develop a secure understanding of how to build firm mathematical foundations

  • You will work to develop teaching strategies focused on developing fluency in calculation and number sense for all children

  • You will develop understanding and use of appropriate manipulatives to support your teaching of mathematical structures

What is the cost?

  • The Mastering Number Programme is fully funded by the Maths Hubs Programme so is free to participating schools. 

  • Schools that apply by 1pm on 28th March 2024 and are accepted onto the Programme will receive a free set of rekenreks. 

  • Digital rekenreks are also freely available online.

How do I apply?

Applications have now closed. Please browse our other available Professional Development opportunities.

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