A friend of mine runs a tutoring company in London, typically employing grad students to work for her but is finding it difficult to retain the tutors as they all eventually get full-time jobs, often at a moment's notice. We have been brainstorming over coffee to come up with ideas of where to find fully-qualified teachers who may want to do some tutoring as she feels that they will be more reliable. She is happy to have teachers looking to supplement their income, retired teachers, teachers taking a break or even those in the midst of teacher training.
Can anyone suggest where she could start looking? She has thought of advertising in TES - too expensive and has tried putting an ad at a university with a PGCE programme - no response. She would be very grateful for any suggestions.