Schools Unblocking Websites?

I used not to be able to access several of my favourite websites in libtaries, like freeexampapers.com or freeetextbooks.com or demonoid.me.
Now I can access the first two of these. The last time I checked, the websites I could not access in schools could also not be accessed in libraries.
Have schools changed the sites they block? A site like freeexampapers should not be blocked anywhere.