In short, we're not happy with DS1's school. Lots and lots of small and big issues with both the school and the local area demographic which have added up to us looking at moving house to get him into a 'better' school (in terms of Ofsted and his happiness). I feel awful about making the wrong choice and now having to uproot him, but I figure of we know we've got to do it, the sooner the better 
Obviously we're limited by schools with spaces in reception (or yr 1 if we stay put till next summer, not sure if there's any benefit in that), but we have can move more or less anywhere in east Devon, so I'm sure we'll find a few.
However, given that I clearly chose so badly first time round, help me work out how to choose a good school for him this time! What sorts of questions should I ask/things should I be looking for when I look at new schools?
His current school has been turned into an academy after being put into special measures, but I was 'fooled' by all the hype about the investments being made and new teachers, new head etc, but it just isn't living up to expectations, so teach me what to look for, please! I feel so awful for failing DS1 and really want to get it right this time, as there's no way I can uproot him again without good reason!