I'm feeling at a loss as to what to look for, and how to find out the information. I feel that Open Days, Ofsted etc can only tell you so much about what it's like to actually attend the school.
@choosestress schools are under a lot of budgetary and workload pressure at the moment. I'm a governor in a very succesful and popular school, and our senior leadership team are telling us it has never been this bad. And parents are getting more and more demanding too. Please don't add to the problem by bombarding schools with FOI requests and emails. You should be able to find everything you need on school websites, in governors' minutes (which are available on request from the school office, if not already published online), open days/evenings, and by local reputation.
Even if a school is doing well now - that will be no good to you if their popular Head is about to resign due to stress, or if they are about to make massive cuts due to a looming deficit. Many schools are in this position.
Staff turnover. I can see this is a huge issue nationally. How can I find out what a school's staff turnover is
You can't, but keep an eye on their Vacancies page. If they are regularly advertising for key positions like Heads of Maths, Science, English, that is potentially worrying. If they are advertising for a new Headteacher, then all bets are off - wait to see who they appoint before committing. The best Heads will be a breath of fresh air in a school, and may, over times, bring a wave of good staff with them from previous schools where they have worked. The worst Heads will be bulls in china shops, and drive out the best teachers.
Also, remember that raw numbers for staff turnover tell you nothing about the quality of staff leaving - good schools will make sure that poor (and unimprovable) teachers are moved on.
and what % of lessons are staffed by cover teachers? Would a school tell me the answer to this? Would I need to do an FOI request?
It will be more than you're happy with, even in the best schools.
Behaviour. Our DD is very well behaved and finds excessive classroom noise stressful. How can I find out what behaviour is like, and whether the behaviour policies are actually followed?
Every school will have some year groups and some classes that are more disruptive than others. If you ask on Facebook etc, the answers will depend on the experience of the individuals replying, and will tell you little about your future experience. Ask a few different teachers about behaviour at the Open Evening, and see what they say while looking you in the eye. Also, check for behaviour posters in classrooms - if there are visual reminders, its a sign its being taken seriously.
Phone policy - we are very anti phone in the classroom as it's clearly as distraction and affects behaviour. How can I find out what the phone policy is?
This will be on the website, probably on the policy page, or in the student section.
Sexual harassment - I want a school that take a very firm line / zero tolerance stance on sexual harassment of girls, whether that's in person or via social media.
Check the website for relevant policies and the Equalities Plan, which sets out objectives they are focussing on. Sexual harassment is also currently a key focus for Ofsted, and schools are very aware of the issue following recent news headlines. But some may have a bigger hill to climb than others if they're having to overcome negative attitudes embedded at home or at primary school - sadly, that comes down to cohort and area, as well as strong leadership.
How can I find out girl's experiences at the schools? Could I request data on how many instances have been reported at each school?
That would only tell you how many are recorded, not how many are taking place - the best schools will have a zero tolerance policy, so may record more incidents than the worst schools.