Further to my article on wikipedia and google
I have just discovered an even better resource here:
Wikipedia selection for schools
“SOS Children UK, in coordination with the Wikimedia Foundation, has released a complete 2008/9 revision of the Wikipedia Selection for Schools, which is perhaps the most successful ‘checked content’ project derived from the English Wikipedia. Previous revisions have been distributed off-line widely across the globe including by the Shuttleworth Foundation to South Africa Schools, by the Hole in the Wall project to rural Indian children and through SOS offices worldwide. The updated selection has the content of a 20 volume encyclopaedia – with 34,500 pictures, 20 million words and articles on more than 5500 topics. This revision, which can be freely downloaded or collected free from SOS Children is selected and organised around the UK National Curriculum and aimed at 8-17 year olds who broadly follow the UK National Curriculum and similar curricula elsewhere in the world.”
This looks like an absolutely fabulous resource to draw upon, especially given that adult topics have been removed making it safe for students. The best place to start is the pictorial subject index. I have had a look at the Maths section and it looks quite good. There are several hundred entries ranging from elementary to advanced. Something for everyone.