Maths:

http://coolsciencelab.com/math_magician

www.ixl.com 

www.mathematics-monster.com    

https://www.topmarks.co.uk/maths-games/hit-the-button

English:

www.grammar-monster.com  

www.bbc.co.uk/bitesize/ks2/english

All:

www.bbc.co.uk/bitesize/ks2/   

www.educationcity.com/