[old timer]

I have been out of teaching for a long while, 8 years or so, want to return and have been doing some supply. Am applying for a job at school i have been doing supply at, the problem is my references. I have no one to ask for a reference of my teaching ability, this school has been my main supply. I have used the school for a reference for a supply agency, but I can't really use them for a job at the school, can I? Any advice regarding letters of application and references would be gratefully received. Thanks