although quite a bit of the stuff in y11 isn't tested again, IMO, y11 gives you a good foundational understanding for y12. the overlapping content (eg. ue, eg, monetary/fiscal policy, market failure etc) is taught again, but doing well in y11 does set u up wellish for yr 12, so maybe js go over basics (like supply and demand). lowkey tho even if you did bad in y11, its very easy to redeem yourself for y12 given you lock in and put a decent amnt of effort, esp as there are a lotta hsc economics yt channels and stuff like that