Footprints Science – loads of simple, clear interactives
This site has a good collection of animations and interactives aimed at KS3/GCSE levels. It is divided into Bio, Chem and Phys and has a section on coursework. Well worth spending time having a look there, especially as most of them can be saved easily.
Special prize for anyone who can work out what the Taj Mahal is doing in the banner for a Science website.