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when typeing in the url for the site you want to access instead of 'http' put 'https' for eg 'http:\\
You must login or register to view this content.' --> 'https:\\
You must login or register to view this content.' and will allow you to logon, when going from page to page on facebook you will have to keep entering the 's' onto the 'http' --->'https'.
this will only work if your school has Internet explorer 8!
unfortunately this wont work with youtube but most sites it works including NGU,facebook,miniclip,and others.
please thanks if this helped.