How do I get through the block on bebo?

Answer 1

You go to School for a reason - not for Bebo
Doing work and passing exams will benifit you so much better in the future.
I know you don't want to hear this, but you can't and you shouldn't even try because that is against the acceptable use policy at your school. They have sites blocked for a reason and trying to bypass their security will get you banned from using any of their their computers and probably even suspended or expelled. They track everything you do and you will get caught.