Can't help you with the job fairs questions though there are a couple coming up in London - though you might be a bit late to sign up. Look at a school's website check on these forums - people are normally more than happy to give help if you put a cryptic clue up on the forums and PM's are generally fine. There's also the international schools review (ISR) which costs money to sign up to but is quite informative. It can be a little overly negative but there isn't much that can be done about that, it's human nature to complain more than we praise, it should however give you some good ideas about any pitfalls a school may have. Trawl these forums, excessively, obsessively, they're very useful.