Oddly enough, I had a look at Rising Stars earlier today, trying to find exactly the books you mention. All I found was Achieve Level 3 for KS2 - which I nearly bought until I 'Looked Inside' it and realised that Level 3 at KS1 is VERY different to Level 3 at KS2
Okay can someone confirm this for me because I assumed that the levels remained static regardless of key stage. The book cover says Key stage two but wouldn't that be because strictly speaking it is key stage two children that work at level 3. I was under the impression that key stage one children working at that level are above the norm and therefore have moved onto stage 2 work.