I don't know if anyone in Britain's heard of the course, but I'm just finishing my studies for AEA (Advanced Extension Award) History. Apparently it's similar to the old S-levels, and it's really thoroughly interesting. Dealing with the theory of history and historiography rather than any actual periods in history (though obviously there is a need for continual reference to all periods of history to understand its theory), we've covered views from the Rankean "wie es eigentlich gewesen" depiction all the way to the Annales school. Intellectually challenging and thought-provoking, it's made me constantly review all historical study that I come into contact with in a far more advanced manner, and I'm very grateful that I got a chance to study it. For anyone interested in theory, I would recommend E.H. Carr's "What Is History?" as a superb primer, despite its age (I particularly agree with his "mountain" theory of interpretation and objectivity/subjectivity, as well as the discussion of the nature of historical fact), but there are of course many more books on the topic.