Some useful websites for you to use:
TTRockstars - Times Tables Rock Stars – Times Tables Rock Stars (ttrockstars.com)
Topmarks - Hit the Button - Quick fire maths practise for 6-11 year olds (topmarks.co.uk)
BBC Teach website - KS2 Maths - BBC Bitesize
Mathsframe - Most Popular Free Maths Games - Mathsframe