What other methods can be used to unite a group that are not used in The Wave?

Groups can be united in many
ways.

In school, groups find unity through shared
activities and shared interests. We see this exemplified in clubs and sports
teams. 

Also in classrooms, group activities and group
presentations can help create a sense of unity. 

Generally
we can say that groups are defined "positively" and "negatively". Discussing groups in
this way may help us to see how group unity can effectively be
generated. 

When a group is defined positively, it is
defined by what is present: the presence of shared interests, of commonality, etc. This
connects with the notion of school clubs. 

When a group is
defined positively, it is defined by what "it is not". This is true of sports teams.
Teams compete against groups that are distinctly in conflict with themselves. One team
is not the other, by definition. They are defined by who they are not; defined by
opposition. This is also true of group presentations. The presenting group is not part
of the rest of the class while it offers its presentation.