If your school blocks facebook you shouldn't be worrying about how to unblock it. You should be paying attention to your teacher and LEARNING. Facebook is blocked at your school because it isn't a learning tool. You need to focus more on your studies and maybe you won't be bogged down by ignorance.

The largest bone in the body is the Femur (Thigh Bone).

Sound to me like your dog had a stroke. Any reason why you haven't told a vet about this problem or taken your pet to a vet???? CALL A VETERINARIAN!!!