Get rid of all the academies so that it's a level playing field in terms of staff contracts etc.
Create a uniform that is comfortable and cheap to source for parents (no logos) and allow them to wear comfy footwear like trainers.
Get rid of all the stupid rules about hair colours, etc.
Pay LSAs more money so it's a more appealing career choice which means there's more staff available for pupils who need it
Scrap targets on attainment - exams at the end which are no pressure for grades.
Allow lower ability pupils to access easier exams. Pupils who can't grasp simple concepts in English, for example, shouldn't be expected to write three pages about Shakespeare to pass!
Thin out the curriculum so pupils can spend more time on things that will actually benefit them. Not forcing pupils to pick options that they don't actually want to do and have no future use for. I picked geography because there wasn't anything else in the block to choose from - never used it, didn't want to do it, could've done extra science or maths which I was shit at! Or something useful like money management, home economics.
Make sure there is plenty of alternative provision available for children who can't, for whatever reason, access "normal" mainstream education.
There's loads more...