The following provide both data and documentation about those data:
The Survey Question Bank (SQB) (this is not a data source but a source of information about questions that have been used on previous surveys, with links to the surveys).
The Data without Boundaries (DwB) project: This exists to support equal and easy access to official microdata for the European Research Area.
Open University course material for Statistics in Society (code: MDST242): Click here
Cohen, Manion and Morrison. 2007. Research Methods in Education (6th edition).