Dee - talk to the teachers about your fears - they may think you are crazy, but at least you will get answers. Just ask how they prevent strangers from walking in, how do they keep kids safe when going to the toilet, if Ashlea just started walking home by herself would they let her? Do they know about your situation with your ex and whether he is allowed to pick her up etc. If the teacher is no help (I'd be surprised) talk to the principal. Knowledge is power! and if there is a hole in the way they do things, you might bring it to their attention. I KNOW you are not the only prep mum who will do this!!