Your Half yearly questions tend to be less tricky than your trial/hsc questions. For example, in the half yearly last yr we were asked to list and explain how the priority areas are determined (e.g. Priority polulation groups, cost to the individual etc). A HSc question, however, would integrate more areas into this - e.g. 2003 they asked to critically analyse why cancer was made a priority area, which is the same kind of thing as the first one, but applied to cancer - making you think more about it more. Half yearly's arent too bad so dont worry! its a shorter exam too