Please find below some useful websites.
Maths
https://corbettmathsprimary.com/
https://uk.ixl.com/math/year-6
https://www.bbc.co.uk/bitesize/subjects/z826n39
https://www.topmarks.co.uk/Search.aspx?Subject=16&AgeGroup=3
English
https://www.grammar-monster.com/
http://www.sheppardsoftware.com/math.htm
https://www.bbc.co.uk/bitesize/subjects/zv48q6f
https://www.topmarks.co.uk/Search.aspx?Subject=9&AgeGroup=3
https://www.bbc.co.uk/bitesize/topics/zhrrd2p
PIXL Unlock App
Foundation Subjects
https://www.bbc.co.uk/bitesize/levels/zbr9wmn
Past SATs paper