Ditch non-subjects (or stop funding them) like film studies, various 'critical' theories' and redirect any funding from them to more useful topics .. or as earlier mentioned skills thatre actually useful in life such as money management (the number of people on this forum with cifas markers being a case in point).
On a more specific level though, id like to see the history curriculum completely overhauled. The current one being ridiculous in not teaching anything of relevence to British history (the history of medicine hardly being the most pertinent bit of our history when the empire is utterly ignored) along with some vaguely more interesting things, ditch the unification of germany/italy and the Spanish civil war and focus more on, as noted, our own history (which happily touches many other countries from Malaya to India and Australasia) as well as other countries stand alone history there being plenty of examples fo fascinating events around the world thatre simply ignored for tedious junk.
I imagine maths can be redone as well to make it more engaging. There was an interesting story about a teacher who used weed to help teach students (as in using its weights and sales) which actually engaged the students and showed higher levels of students doing well, as opposed to 'akhmed has 5 apples' or such boring stuff like that. Its less a matter of maths being inherently boring (although it kind of is) but it isnt helped by the reaslly *****y way its taught that doesnt speak to kids at all.