Maths:
https://www.topmarks.co.uk/maths-games/7-11-years/ordering-and-sequencing-numbers
http://www.crickweb.co.uk/ks2numeracy-calculation.html
http://www.primaryhomeworkhelp.co.uk/maths/
English:
http://www.primaryhomeworkhelp.co.uk/interactive/literacy2.htm
https://www.topmarks.co.uk/english-games/7-11-years/punctuation
http://www.crickweb.co.uk/ks2literacy.html
http://www.bbc.co.uk/bitesize/ks2/english/spelling_grammar/
http://ictgames.com/literacy.html