A number of resources , including online quizzes are available at these locations:
Webschool Revision Resources : www.webschool.org.uk/revision
Dr.Overy’s Kbase : http://www.globalmatters.org/topics
with the download zone here
Webucate’s Resources : www.webucate.org/ourgallery
e-physics.org.uk : http://www.e-physics.org.uk