revision/workbooks/practise papers

[WillIEverBeASizeTen]

Can anyone recommend some good revision/practise workbooks. DS is is YR8.

Any particular subjects?

CGP are really good for the GCSE level. DD in yr 9, only used the science one so far, but her and friends seem to like it.
They do KS3 as well, but just English, Maths and Science.

The BBC bitesize website have exercises and revision type stuff also.

Thanks Circular...was looking for exactly those subjects!