On Line, On Track - Literacy and Numeracy KS3

"The great problem is finding material which deals with their skill level
without being too juvenile in content and context
I'm not sure if you would find this relevant, but here at London Grid
for Learning we did a PRU-focussed project for KS3/4 called On Line, On
Track about 2 years ago which might be useful (it's for Literacy and
Numeracy)
Try http://www.lgfl.net/lgfl/accounts/olot/

This http://cms.lgfl.net/lgfl/web/nen/links will give you the links to
the other learning grids if you want to have a trawl around
David Mason"