Engage your class in a discussion activity about the practice of segregation and the idea of borders.  Define “borders” both literally and figuratively, and identify different types of borders (national, geographic, religious, economic, ethnic, educational, etc.) in the large group discussion.  On the board, list examples of those types of “dividing lines.”
 
Separating students into groups of two or three, encourage them to consider what the two themes have in common.  Request that each group offer three similarities between the two concepts and list them on the class board. 
 
In the same small groups, ask students search today’s newspaper for articles that illustrate the dividing lines and borders that pervade society.   Match the content to your list of border types.  Discuss borders that students have faced or are likely to face in the future, imagining scenarios if necessary.
 
What steps would each one have to take to break down those barriers? Do population percentages in a given city/region always define borders? What type of economic impact does segregation have on a society?