Social Identity is the way we use membership within a group to obtain a sense of who we are. Simple Psychology.com provides an explanation that covers all aspects of the theory in a way that is easy to understand. It discusses group membership and how we use social categorization to enhance our self image. It also provides an outline of the theory with examples.
A description of the Social Learning Theory using notes from Ormond's Human Learning. It is provided by the University of Texas at Austin's College of Education. It addresses the general principals of learning and the cognitive factors that are involved. It also describes the behaviors that can be learned, how the environnment affects them, and techniques people may use to guide behavior, regulate behavior, and decide if a behavior is appropriate or not.
Bharat Kumar's article at preservearticles.com discusses the behaviors or "roles" that are associated with different places people hold in society and the norms that are associated with them. He also explains the different aspects of roles and how they can positively or negatively affect social interactions.