What are your marks at school?i get fours and fives.Fours and

What are your marks at school?i get fours and fives.
Fours and fives?What do they mean? Are you a good pupil?
Yes, 4 means good and 5 means excellent.
Oh, well done! But in my culture they mean В and A.
What form are you in?
I'm in the third form.
Really? How old are you?
Thirteen.
I'm thirteen, too. But I'm in the seventh form. Sorry, I don't quite understand.

Well, at most English schools forms start only at the second ary school, at the age of eleven.
Перевидите