Hi purpleme12,
For us the first considerations/ questions were around will this school work for us - so can I easily get to and from work, is there breakfast club and after school club if we need it, are these places limited (as they are in some schools) or is it more of a dead cert we'll get a place in breakfast and after school club if we need it, is it handy for younger siblings' nursery, for schools between 0.5 and 1.0 mile away, are they on a bus route as, although we'll manage the walk there and do this sort of distance every day already to the nursery, will need a bus back as starting primary is exhausting etc. etc. We didn't bother with anywhere more than a mile away.
From there, and most importantly to us, do the children look engaged, energetic and happy (we visited a lot of schools, mostly at the same time of day and it was amazing how wildly this fluctuated - at a couple of the schools kids looked positively bored), do the staff interact well with each other, did the head teacher seem approachable.
And finally, did it 'feel right' and could we imagine our daughter there
We only felt the last 'fit' at the last school we visited. And then we knew that was the one for us. It wasn't the best ofsted or the best results but we knew it was the one.
There are a million other detailed questions that can be asked, but this was how we approached it, rightly or wrongly!
There were also some teachers on some of our visits (looking for their kids) and it was interesting to see their approach which was to get down and chat to the children, rather than ask the teachers questions.
Hope this helps. And good luck.