24 for a class is a good number- have the variety of whole class, pair and group work.
Whilst I am tired of all the changes we have had, I'd like a new primary curriculum set out which focuses on what the next generation need for their lives that they are going to live, both in knowledge and skills. The current one is based on My Gove's rose tinted view of what he though helped him.
I'd like it to focus less on knowledge and what can be tested, but what is useful, and transferable, what interests the children and gives a good basis for secondary school for those teachers to then extend using their subject specialisms.
Ofsted would be gone- there would be something in place which checks schools for safeguarding and supports schools in fulfilling their own school improvement plan.
I'd get rid of knowledge organisers. TBH, they'll be gone in 2 years anyway and something else will be the next in thing. And 'sticky' learning- it used to just be called learning. Any fads can do one.
I'd overhaul assessment. My current school is a nightmare for this with its marking policy and software systems. It's more concerned if a teacher has used the right colour highlighter for a spelling mistake, etc, than if a teacher has set good quality work and given good quality feedback.
Student teachers need to train for longer, and have experience in at least 4 different schools. Obviously there is a cost to this, but in my world, training to be a teacher would be free, with the condition that teachers stay in state education for a minimum period in order not to pay any student loans back.
There'd be a thorough system in which to raise SEND concerns, have them looked at and helped with/resourced within a half term.
Support and fund places like the NHS/social services/police etc so that they are able to do their jobs, and not passing those responsibilities onto schools with £0 to do it with.
I know that having more PPA is often raised in which to be able to carry out all the tasks a teacher needs to do. I have been teaching long enough to remember that we didn't used to get PPA, but the admin placed on us was manageable and more importantly, adequate. I'd far, far rather the admin was cut, and I was in the class full time, teaching, doing the part that makes the biggest difference than spending time outside on planning, preparation and assessment.