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We just use the relevant parts of the BBC bitesize website for Maths and Science to help revise the topics that have been covered so far. dds school also has revision resources for Maths on the school website that can also be accessed from home. KS3 revision books aren't really relevant for Y7 as they date back to the days when children took KS3 SATs in Maths, English and Science in Y9. Y7 children won't have covered all the topics yet and KS3 SATs were abolished a few years, so really these books are no longer relevant and some of the content may be out of date.