This site provided an excellent resource for PGCE students, for NQTs and for those who work with emerging teachers. It has now been archived and is available here
Obviously the priority for many teachers and students has to be the set of professional standards which are available here.
The TTRB site has great links to many different sites such as Behaviour4Learning and Subject Resource Networks it also has many different highly useful features:
Subject link – By searching under mathematics you get a wide range of resources, web links articles and reports all pertaining to initial mathematics teacher training. This will be an excellent source of help for new mentors or tutors.
Materials by Standards – This is a lovely section. The materials are ordered by new professional standard so if you are looking for material to support the acquisition of a certain standard you can look it up here. This will be invaluable for teaching practice students and those supporting them.
Glossary – If you are new to teaching this could save your life, though you should bear in mind it is now slightly out of date – it contains many of the acronyms invented along with a cogent explanation as well as sections on many different words and phrases which are used in education.