Incompetent teachers 'being recycled' by head teachers

In the las 40 years only 18 teachers have been struck off for incompetence. This is despite estimates that up to 17,000 teachers are not up to the job. Incompetent teacher are teacher who could not keep control in the classroom, had a lack of understanding of their subjects or might not even like their pupils. Some incompetent teachers moved between school by getting a good deal from the head teacher. head teachers who were unwilling to subject those suspected of incompetence to proper competence tests. instead they are being guven good references in exchange for agreeing to look for work in alternative schools.

http://news.bbc.co.uk/2/hi/education/10464617.stm

I think that head teacher have to be tougher. This should not be possible even with the shortcoming on teachers. The teachers need to be given a reason to achieve competence. If not why would they? Also, parents need the assured that their kids get proper education. It would also be very easy for the teacher who are incompetent to become competent. If they would follow a minor about class management a lot of problems would be solved. Only the teachers who don't like their pupils are likely to be unwilling to become competent. Head teachers step up!