How will you open them?
In a quiet corner of the school hall (unlikely, it'll probably be far too noisy and packed) or on the school field (which should be empty so I can have alone time)
How will you celebrate / react?
This definitely depends on the grades... If I've got what I wanted/close I might go on some sort of impromptu outing maybe with friends. If not I will probably go home and cry in my room on TSR for a while... I'm planning on going in on the train so that I'm not too stressed by parents.
Will you meet your Sixth Form/College offer?
I seriously hope so, it will have gone pretty disastrously if I don't.