When I taught English at a Japanese university, I struggled with how to get the students to think outside the classroom. Inside the classroom, they would speak perfect English, yet once they went out into the real world, they froze up and couldn't speak at all. Now I know why.
For most students, there has never been a place "outside the classroom," because for their whole lives they have taken the classroom with them wherever they go. For years they have done everything with their classmates, from school to sports, club activities and juku after school classes. Even trips they have taken have been school trips.
I shared an airplane with an entire classroom the other day on a domestic ANA flight. It was quite a shock to realize, at check-in, that I would be one of only a few people over 16 years old on the flight. Luckily, the students were well-behaved, and the only thing I had to worry about was that they might try to hijack the plane to Hogwarts.