https://www.mathsisfun.com/ 

A comprehensive maths website which includes explanations and teaching of topics as well as games for children to play. 

https://www.bbc.co.uk/bitesize/subjects/z826n39 

BBC Bitesize maths has games, videos and teaching on a range of Year 4 topics. 

 

https://nrich.maths.org/9084

Lots of high-order maths puzzles for children to explore. 

 

https://www.prodigygame.com/main-en/

Prodigy is a free online game where children explore a magical world and battle against creatures, answering grammar and maths questions, to fulfil a quest.  All children have log ins. 

 

https://www.bbc.co.uk/bitesize/topics/zkbkf4j/articles/zbm8scw 

Crystal explorers is a free game on BBC bitesize where children answer grammar questions to collect crystals.