Regular reading at home and practise of spellings and number facts (e.g. times tables) is some of the best revision the children can do.
Below you will also find lots of links to different websites which will help children to prepare for their End of Key Stage Assessments:
http://www.bbc.co.uk/bitesize/ks2/
http://www.compare4kids.co.uk/maths.php
http://www.theschoolrun.com/sats/sats-year-6