“The House on Elm Street” is an exercise developed by Professor George J. Siedel with support from the University of Michigan.  It involves a transaction that students can easily relate to:  the sale of a house.  The twist in the exercise is that, unknown to the seller, the buyer is a secret agent representing a large company.  Each student receives a short (two-page) role as either the buyer or seller, and they negotiate for 30 minutes, followed by a debriefing.  The exercise is designed to achieve several learning goals.  For example, students will learn how to:
1.       understand different types of negotiations,
2.       prepare for future negotiations,
3.       recognize and decide ethical issues, and
4.       develop and use their negotiating power.
Here is a link to a free package that includes a Teaching Note; two roles for the role play; and slides for your use in class:
https://umich.box.com/s/ewycm8d4vedns15hj7m68oxfx4yu2qvz