I've just read this thread and have found some of the comments profoundly depressing. It appears that some posters just do not not know what good teaching is. It is not just about delivering a pre-planned lesson or supervising pupils while they follow instructions from worksheets or books. Good teaching involves a dynamic which inspires and motivates pupils to learn.
I am an experienced, qualified teacher, who worked for many years in secondary schools. Since taking a career break, I have worked as a supply teacher and cover manager, responsible for organising cover and supervising a team of cover supervisors.
I can state quite categorically that cover supervisors are being required to cover for far longer than was intended in the original job definition. In some cases, I was required to organise cover for subject specialists using cover supervisors. In one case, language classes had their classes "taught" by people who couldn't even speak the language. My own daughter was a pupil at the school and she had maths classes covered by unqualified non-specialists for nearly a term.
The cover supervisors tried really hard, but they didn't have the skills to adapt lessons or to teach pupils anything new. After a few lessons, pupils realised they weren't being taught, so started mucking about. As cover manager, it was my job to follow up discipline problems in cover lessons - and there were plenty of them! Some of the cover supervisors realised that the best way to get pupils on side was to humour them, with the result that very little learning ever took place.
The school was having extreme financial difficulties and the use of cover supervisors was an attempt to bring the deficit down. However, when Ofsted came, I was told to ring round the agencies and get in four qualified supply teachers - no matter what the cost. When Ofsted arrived, there was only one teacher absent, so the cover supervisor team and most of the supply teachers sat around the staffroom all day. In the end, I couldn't stand the situation any longer and resigned.
Nevertheless, I think that a good cover supervisor can do a better job than a bad supply teacher, but only because cover supervisors know the pupils and school procedures. This argument is currently being totally undermined by the use of supply cover supervisors.
Many schools have now realised that having cover supervisors on the permanent payroll means that they are not utilised effectively when there are no staff absences. Therefore, they now employ cover supervisors on a day to day basis. Since the fall in demand, agencies are desperate for work and are only too happy to supply unqualified cover supervisors at a lower rate.
Last year I had a long-term supply teaching job, taking over from the cover supervisor team. The classes involved hadn't been taught for over a month and it took me a few lessons to get them back into the habit of working and behaving. One of the pupils said to me that they thought I was going to be like all the cover "teachers" they'd had, but they soon realised that I was a "real" teacher.
I am saddened that good teaching seems to be so little valued by some parents and people who work in schools. To all the TAs and cover supervisors (especially the ones who like to gossip in little covens), please go and get yourselves qualified if you do such a good job.