When I was in year 10 (way back in 1995) the chief inspector of schools wrote in his annual report that there were 15,000 bad teachers who needed to be removed (see para 14 in http://www.publications.parliament.u...t/60221-23.htm
For those of you who have the misfortune to be taught by poor teachers, please don't just sit back and take it. These are your futures that are at risk. It would be great if you all engaged in the political system to put pressure on those who are in control of your schools to get them to deal with the problems.
Have a look at this thread - http://www.thestudentroom.co.uk/showthread.php?t=427379
for who to contact.
Apart from your MP, for those of you who live in "2-tier areas" - that is with a borough/district council and a county council, you will need to email your county council. For those in unitary/metropolitan areas, you'll only have one council to contact.
Basically it doesn't look good for a council or a school if their pupils are complaining about poor standards of teaching and thus complaints are more likely to be taken seriously.
Given the changes that are taking place within local government due to a bill currently going through Parliament ("Local Government and Public Involvement in Health Bill") local councils are going to be much more interested in what happens within schools.
If you don't complain to those who run your school, they'll assume there's no problem.
On the flip side of the coin, if you have a really good teacher, although there is the risk of "teacher's pet" accusations, it really does make a huge difference to teachers if you let them know if they are doing a good job and/or if you are enjoying the subject area that they are teaching. It makes things so much easier and more enjoyable for them if they have a class full of motivated people who have a desire to learn. If teachers know that they are going to go into a class and have fun teaching, it makes your lives much more fun learning and then exams feel much more easier come the summer because you've had fun learning.
(Please feel free to moan at me if what I've written sounds far too idealistic!)