What assessment paper or material to buy for 11+. Help

[busybees]

Hi i went to WH smith to but the paper or some books to buy for my son but they have different levels. Should i but the level one or higher and whats the best materical or books i should buy.???

Please help.

[isymum]

Start him off with the CGP papers, then move onto the NFER and Bond. Once he get the hang of the questions the speed will then pick up.