I would reintroduce secondary modern type education. With NO STIGMA. And in these schools students like my daughter who hate subjects like history, English literature etc would not have to study those. Pupils would be able to take control of their education and choose subjects that will benefit them in the future - eg. A student with interests in building would be able to choose a suite of GCSE type qualifications in vocational subjects in conjunction with decent supporting subjects such as business studies, maths, marketing & web design, science, English language and some sort of language. Teaching them skills that are relevant to the world of work, giving them the skills to work for themselves. But the most important thing would be that this would not be denigrated as too thick to do anything else. We need all sorts of people in the world, not just to try and push everyone in the same direction. IMO the roots of the disengagement of lots of pupils with education can be found in forcing non-academic kids to keep on with subjects they hate. Nothing less motivating that spending years studying stuff you don't want to learn and failing over and over again because your brain isn't wired that way to kill off teens' self esteem and motivation to learn. They just are stuck in a perpetual cycle of failing, being set up to fail and believing they are useless.
pupils with an academic leaning can continue as they always have done.
i would remove ofsted gradings completely and completely overhaul the schools inspectorate. Primary school testing, league tables, all of it would be scrapped. GCSEs and A level results would be delivered through mini exams throughout the course, a final exam maybe worth 25% and coursework. This would give all children an opportunity to do well in at least one element of assessment, if you hate coursework you've got the exams to do well in, smaller topic based exams for those that struggle with revising an entire 2 year syllabus in one go and coursework to show you can do project work and steadily work.
schools inspectors would have to do at least 1 month back in the classroom every year just in case they forget what it's like teaching 30 teenagers.
cookery and health/nutrition would be compulsory for all students in all secondary settings throughout their entire education. They could drop the endless First World War and Shakespeare plays to make room for it. This would allow children to learn essential skills that are clearly lacking in society that loads of parents cannot deliver but that imho are essential to develop a healthy country. The one thing we all need to do, not matter what you do in life, is eat.
hopefully my changes would mean pupils were more engaged with learning and more focussed in class which might help solve some of thr discipline issues that have put so many of our teachers off their career.