NC style resource to help DS (Y9) discover the holes in his maths, anyone?

[Erebus]

Can anyone direct me to a place where DS can do some end-of-KS3 appropriate questions to help him and me find out where his maths falls over?

Is there something in, say, eMaths I've missed?

He's just done quite badly in his test (6 High which is where he was a year ago...) but some of his grudgingly done revision revealed he wasn't confident, for instance, in adding and subtracting negative numbers. 'A chat' has persuaded him he has to pull his socks up so he's prepared to try and identify the stuff he doesn't know so we can work on it. Any ideas where I can find this, short of making him trawl through every SATS past paper- which even so, might reveal a failure in the application of knowledge rather than not understanding the raw maths, ifswim.

TIA

I'm not too sure if there is somethign specific but maybe the KS3 tests at BBC Bitesize - there are lots of them for the different areas but they are each pretty small so it shouldn't take too long.

The Khan Academy is good for explaining say the negative numbers then giving him questions to do.

Does the school subscribe to mymaths? If so, he could access it from home. I think it it's a great resource, dd enjoys using it, and she's a bit maths phobic.

Also youtube can be good for specific topics. I'd ask for a copy of the paper he sat and go back to the basics on any question he got wrong as even if it is just application it embends the topic.
Ask him what he think he isn't so good at. DD didn't understand bearings and on youtube it had several past GCSE questions that she could attempt then the teacher on them explained the correct answer and method. She was fine after this.

Mymaths is ACE. When DS was off school with whooping cough, he did a bit of mymaths every day after the first couple of so weeks when he felt like he was going to die, and it made a gigantic difference to his maths confidence when he got back to school. On mymaths it's done by topic and by level and there are questions, training questions, and games. DS and DD2 both love it and go on there 'for fun'.