School textbooks- help

[statisticianintraining]

My son is about to start Secondary school in Wales. I just can't get my head around the school system. They went through primary in Wales (and I had the same quesiont then) but where are the books? I've been on amazon and google and the WJEC and I can't figure out what textbooks they will be using. Loads and loads of revisions cards, workbooks etc but no straightforward books. Any suggestions, recommendations? Science and maths in particular

We are in England, the only text book we had to buy in Y7 was French, and it was through the school - they wanted he kids to write in them. Others are lent from the school, they give them back at the end of the year.

Yes we are stocking up on all of the above and clear plastic exercise book cover stuff. Not sure what it is called.
Loads of pritt stick too

Sticky back plastic - the joy of secondary school.