A freebie for you :)
I have uploaded an export of our extensive ISA block list for anyone to use. It contains all google sites excluding .co.uk and .com.
It also blocks the Google personalised page but beware, if the pupil has selected personalised homepage then they wont be able to access google. You would need to build in to your logon script a bit of code to delete the google cookie everytime they log in and that solves it.
Easy to find the code using google.
Enjoy, royalty cheques can be sent to St Edmund's Care of Dis and Jake.
St Edmunds Blocklist