The teacher might develop students' use of critical vocabulary by having them rephrase the model arguments into explicit premises, assumptions, and conclusions. Students could then begin to analyze and evaluate the arguments in a class discussion. Students could suggest ways to make each argument stronger. The teacher may also model improving the arguments and their expression during this and future class discussions. When assigning discussion groups, emphasize the importance of listening carefully and openmindedly to other arguments.
Students can take notes on, and include, opposing views in their essays.
The groups could note assumptions, pinpoint contradictions, and look for strengths and weaknesses in the arguments given. Each group could recap the main points of their discussion to the entire class. Encourage the groups to find some points of agreement. You may want to have students argue each other's positions. Students can then evaluate each other's presentations of their arguments.