For the last year I've been working in one school doing regular supply through an agency. The school have asked me to stay on in September, still being paid through the agency, not a contract in sight. I have agreed to this.
However, today I've been approached by a school I have links with. They've asked if I would join their staff in September. This would be contracted through the LA.
So would it be really bad of me to tell my current school I cannot work for them in September?