The government now wants teachers to have to pass a 'five year MOT' and obtain a licence to go on teaching. What complete nonsense ; presumably it is designed to provide a neat soundbite to appeal to Mr Suburban who thinks teachers do no work and have half the year off on holiday.
The problem with it is simply that it will fail to root out bad teachers. Indeed it is not intended to as the 'MOT' will not be based on outcomes but on passing OFSTED style lesson observations designed to impose a certain style of (often not very effective) teaching and on willingness to embrace technological trends. The government has an ideological agenda to dumb down state education and to churn out gadflies able to zip around from one transient enthusiasm to another while being completely unable to sustain an elongated thought process or cope with lengthy concentration.
The simple way to root out bad teachers is to measure their students' examination results and add on values.