The head at our school wants to ban all sites that contain games, big task but we've got to try, so we have setup a block on any website that contains the word "game " in the url. This blocks quite a lot of games websites, but it also blocks a few revision games websites as they contain the work "game" in the url. When we try to exclude certain websites from the block list we end up blocking all sites except the one we want to be accessed. We tried creating a rule which was "not met if website url = revision game website" but have realised that this blocks all website access except for the site.
Is there a way I can block the word "game" but allow access to certain websites that contain the word "game" if I specify them?