questions re: final exams

[dmwang9]

No: HPFGUIDX 43452

In SS (and perhaps in the other novels as well, but I loaned them to a friend to 
read and so can't check right now), it is clear that after the end of final 
exams, the students stay at Hogwarts for a week before they head home for 
the summer:

"Their very last exam was History of Magiuc. One hour of answering questions 
about batty old wizards who'd invented self-stirring cauldrons and they'd be 
free, free for a whole wonderful week until their exam resuts came out." 
[SS16]

Two questions:

1. Is one hour long enough for a final exam? Perhaps the British model is 
different from the American one, but in my experience, finals tend to last a 
bit longer, from 1.5 to 3 hours at least.

2. What exactly do the students do on campus between the end of finals and 
their departure from school? I teach at an American boarding school, and once 
students finish finals at the end of the year, they leave campus right away -- 
mostly to prevent excessive end-of-year mischief. Once again, perhaps British 
schools have a different policy.

Thanks,
Dave