Hmm, my school does 'issues' rather than debates. However, regarding PYA4 I have tons of notes and 'A' grade essays I've written in class which I'd be happy to share.
I feel with psychology that the amount of time you have to write an essay is incredibly short. Although this is possibly a good thing due to the fact we learn such a large amount of information it means we won't be short of essay material!?
Are you taking PYA4 on the 12th of June? How's the revision going for that?