IOE EPrints is a repository which collects together the work of researchers from the Institute of Education, so that it is freely available. This includes material such as journal articles, conference papers, technical reports and more. To date the collection includes over 6000 items, and a simple search of the site produces some promising looking material for most topics. This site is well worth bookmarking and visiting on a regular basis.
The Institute of Education is also responsible for the DERA Archive - see previous post for details.