A primary teacher described by two council advisers as providing the worst teaching they had seen has been found guilty of serious professional incompetence.
England's General Teaching Council has banned a teacher from teaching for up to two years or until she undertakes appropriate retraining.
She has been working as a supply teacher in Lancashire since retiring from a primary school in Burnley in December 2003 after seven years.
The teacher who admitted to the school's head that she was failing, had no ambition and was drifting towards retirement, did not attend the disciplinary hearing, nor was she represented.
Inspectors, who found the school had serious weaknesses, singled out failings in technology and science which she was responsible for.
Between December 2002 and October 2003 the teacher underwent 10 classroom observations. Five were deemed to be of an unacceptable standard and a further two, poor.
Jane Carrick, from Lancashire council, said: "I have been in education since 1970 and this is the worst teaching I have seen - constantly poor and of low interest."
David Parkes, a second local authority adviser, said: "I would not have wanted either of my two young children in her class. In 27 years it's the worst teaching I have seen."
The committee found the teacher had failed to provide an acceptable level of competence, to effectively manage science and ICT and to achieve the standard of work expected of a member of the senior management team. She was given informal - and by the summer term of 2003, formal - warnings, but the teacher, who had a previously unblemished career, seemed to have no desire to address her failings.
Two action plans were drawn up and she was offered support inside and outside of school.
But Mr Parkes said: "Many things I offered in my advisory role were not taken up. You could say that we took the horse to water but it would not drink. I came to the conclusion that she could not improve."