I left my teaching job at the end of my contract. Have taken a while to work out what I wanted to do next and currently have a small part time job outside teaching. However,I do 1:1 tutoring on morning a week and thinking of doing more. I was thinking of not going through an agency as have a number of potential 'jobs' already. However, I will need to get some references. Can I ask my previous head for an open reference? They will not want all potential jobs contacting for a reference, especially as the relationship with the Head was not the best at the end of my time there. Any suggestions/advice?