"She travelled all over the world while sitting in her little room in an English village."
Lots of English villages are still quite small communities where most people know each other. They might have only a couple of shops and a single school for all the children. Growing up in such a small place, it's no wonder that Matilda enjoys the chance to travel in her mind and see so many exciting new places through her books.
By the sound of it, Matilda's school is a pretty old-fashioned place. Miss Trunchbull, the headmistress, is a believer in old-fashioned education, where children are seen and not heard and classrooms are dull, strict places. Miss Honey must be a welcome change!
One of the most old-fashioned things about the school is that The Trunchbull still wants to be able to beat children who misbehave. This form of punishment is called corporal punishment. It was made illegal in UK state schools in 1987, a year before Matilda was published, so you can see how behind the times The Trunchbull is.