Discuss about setting and the importance of setting to the story. To understand this better, read Writing Dynamic Settings by Kimberly Applecline: http://www.skotos.net/articles/DynamicSettings.html.
elements of a good story: http://www.skotos.net/articles/GoodStorytelling.html
When responding to three classmates, think about how their analyses of the setting compare or contrast with yours.