Yr 6 SATS in May, how best to help DS ?

[piffle]

DS is 10 pretty high achiever etc but is nowstarting to get worried about SATS in May, he ahs asked me to get him some practice papers, but where do I start, which are the best? Or should I leave it?
He sat 11+ and from all accounts has done really well, although will not find out til 28th Feb
Wondering if he passes the 11+ if it may give him confidence in SATS?
He has never been worried about anything before and I wonder if by getting him mockups it might not alleviate his worry
FWIW I think he'll sail through... but if he wants the help should I do it for his sake?
eeeeks
He has been educated in non grammar schools until we moved here to Lincs in Sept last yr, so he has really seen the difference in pressure.

the best way to help him would be to take him out of school for a day imo!

she said it to me not to my ds, but he knows he is terribly disorganised too.
Have frequently taken him out of school custardo, when the stress has outweighed the benefits of him attending, but he is under quite a lot of good pressure at school too, he is prefect, school council leader and a playground buddy, so he is really loving school, he is even loving the challenge of the sats so he tells me, he is just a bit confused about where the results have the benefit, now he knows its the school he is a lot more blase about it!