Is a canadian school principal aloud to make a 11 year old girl sign into face book when she dont?

NO definitely not. Principal's aren't allowed to do that unless she has committed a crime such as cyber-bullying.. because it can be classified as stalking. But as she is 11, she isn't even allowed to have facebook by the law, you have to be 12 or 13. But no, unless she has been cyberbullying, then this principall can't make her sign into her facebook.