This bright, friendly CGP Study Book covers all the topics 5-7 year-olds will learn about in KS1 Maths. It's written in a straightforward style that's easy to understand, with plenty of worked examples and pictures to help pupils develop key Maths skills. There are also practice questions (with answers included at the back) to reinforce what the pupils have learned.
For even more practice, a matching CGP KS1 Maths Question Book is also available - see 9781841460895.