what would you do if....?

I have to teach an A level philosophy lesson to a bunch of 18yr olds... it's on a topic I've barely heard of and never studied before (despite having a degree in philosophy
). I started reading about it last night and even though I've now read about 100 pages from 3 books on the matter, I still don't have a clue what it's going on about, or even what direction I should be focusing on...
