Only 18 UK teachers have been struck off for incompetence in the past 40 years, the BBC's Panorama has learned.
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Bristol University's Simon Burgess
This is despite estimates that up to 17,000 teachers are not up to the job.
Some bad teachers are moved between schools, rather than having their competency challenged, it has emerged.
Teaching unions dispute the claims. The General Teaching Council for England, which investigates complaints, says the number of poor teachers is "not clear".
However, the GTC admits the suggestion that the 18 struck off represented the total number of incompetent teachers in the system is not credible.
Two years ago, its chief executive Keith Bartley said there could be as many as 17,000 "substandard" teachers among the 500,000 registered teachers in the UK.
And former chief inspector of schools in England, Chris Woodhead, sparked anger in the teaching profession with his estimate of 15,000 incompetent teachers.
This is the real issue bad teachers simply get to stay or get shuffled between schools.
Incompetent nurses get sacked every day and I can tell you the number is a damed sight more than is in the whole of the uk
And the fact that people are trying to say oh well they might do better in another school is complete shit
If your not good with kids or don't have a good grounding in your subject then moving to another school won't help you should be out on your ear
I don't won't bad teachers in schools maybe the ones who can be saved should be demoted to teaching asstants and made to retrain
Good on gov
My other issue the quality of the degrees some of these teachers hAve just scraping by and I would also like a teacher who has a relevant degree to what their actually teaching I am not sure about being able to get on the pgce course with some random degree it should be in child care or a relevant subject like English can you imagine someone being able to beam a barrister with some random degree then doing a one year law degree I wondnt want that barrister thanks