The cognitive evolution laboratory at Harvard Universtiy are currently studying morality. As part of their study they have an interesting and thought provoking online Morality quiz, which is open for anyone to take part in.

This would be an extremely useful starting point for discussion about morality with sixth form students. Some may need to be reminded that this is scientific research of course, and so flippant and stupid answers would be inappropriate. The quiz is a series of pairs of moral dilemmas, and choices of action which you are invited to distinguish between. Ideally, I would ask all the students to do the quiz in preparation for a lesson, then would use a data projector or IWB and repeat the test as a classroom exercise, requiring students to come to a consensus about each dilemma.