The word "school" does give a bad vibe, but changing the word doesn't actually change anything, as pupils will still say "I'm going to school", be asked "what school do you go to?" and "do you like school?".
In my school only the toilet doors are locked anyway, so I don't know what that's all about. And I really, really doubt many pupils will want to wear slippers to school...
It doesn't really change much at all though.