Is it necessary to integrate social media in the classroom? How can I use forums like blogs, Facebook, twitter etc. to be a good teacher?

I believe it is necessary to bring these forums into teaching but only to the schools that give the children the chance to use social media in the school time. The reason is because if a child that does not have the privileges to have these devices that hold or make it possible to use these forums will be looked down on by the children who have these privileges. Forums can help keep children up to date on tests and on tasks. It can also make it possible to have the entire years test and task dates on it.