Vital teaching funds lost to supply agencies

A major drain on resources not mentioned in your report (Thousands of headteachers rally against damaging school cuts, 29 September) is the growth of the gig economy in the education sector.A good head wants a qualified and experienced supply teacher and pays the going rate to ensure that the children’s education is disrupted as little as possible.More and more lessons are being covered by inexperienced teachers, teaching assistants or unqualified cover supervisors.