Practise SATs papers can be downloaded from these following sites...
http://www.satspapers.org.uk/Page.aspx?TId=5
http://www.compare4kids.co.uk/sats-papers.php
http://www.satstestsonline.co.uk/sto_past_papers.aspx
Please note: Level 4 and Level 5 questions are now known as 'age related expectation' questions and so this is where we would want the children to be achieving.