June's Primary Round-up brings news of a big new programme of professional development for Reception, Year 1 and Year 2 teachers, designed to give children the best mathematical start.

• Mastering Number - a new programme for 4-7 year olds
• Subitising – a key element of the Mastering Number programme
• Representations – see how they're used in our video lessons
• Mastery – what it is and what it is not.

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Read the Primary Round-up