I have a couple of teacher training courses coming up for Osiris on Assessment in art:
18th November in Manchester
2nd December in London
Full details here http://osiriseducational.co.uk/paul-carney.html
I try to ensure that the assessment techniques I demonstrate are practical, classroom based, easy on the teacher but informative for the pupil.
I was lucky enough to work with the NSEAD advisory group that worked on the art subject competencies.
I can promise you a great day that you should get a lot out of!