Group Identity, Social Norms, and Cliques – Freaks and Geeks TV Show

This clip from the television show Freaks and Geeks serves to set up the different reference groups in a high school. In early adolescents, young people form a scheme an orchestrated, integrated set of ideas about the norms, expectations, and status hierarchy of the salient groups in their social world.

Is there a difference in the way one categorizes ones own group identity and how someone else might see it? What is the difference between a clique and a crowd?