For the last half term. having had enough of my 100 hour weeks, I have ben working in supply in numerous secondary schools. What has astounded me is the number of schools who are so woefully understaffed, that children have had non specialist supply teachers for periods sometimes lasting whole terms and longer - and this in maths and core subjects. The shortage and constant flux of supply teachers seems to have completely eroded discipline and in some schools, the level of disruption in classes that seems to be acceptable is horrendous. I have encountered students who thanked me for actually trying to get control of classes and have seen students with excellent learning behaviours being completely let down by schools that simply do not have enough staff to provide the stable and predictable environment needed to foster teacher student relationships and discipline. I have sat in staffroom at the end of term and witnessed mass leaving parties for 14+ teachers. Teachers who are dedicated enough to stay find that their skills are underused because most of class time is taken up with behaviour issues and many, like myself are finding the workload so ridiculous that supply is the only answer - an answer which feeds into the teacher shortage problem and resulting behaviour problems which cause even more to leave. There seems to be a government accepted situation where lots of new teachers are trained and employed for the few years that they can stand it and then let go to be replaced by more new, cheap teachers. I just cannot see how it is acceptable to treat our young people like this. They deserve better.