We often talk about culture as a source of sustained competitive advantage (see Jay Barney’s article on the topic).
I have run a great exercise where I send students on an artifact hunt through the business school to identify strengths and weaknesses in the school culture. Students present and analyze their artifacts and we discuss the implications for the competitiveness of the school. The next class explores the levers or impact points one would use to influence the culture. A final class might explore the implications of this for managing strategic change. The time this takes may make it better for a strategy elective but I am using it in my core class this semester.
Here is a bit more detail on how the exercise is run:
Here are 
The essence of this exercise is simple. Teams must build a device that will catch an egg dropped from 25 feet (e.g., a stairwell). The trick is that they must build it from items purchased in an auction. As such, items that are easy to use (e.g., an old pillow) are very expensive while items that are hard to imagine a use for (a brick) are cheap. Profit is determined by 1) succeeding in the task of catching an egg and 2) having the lowest cost function. As such, this demonstrates Barney’s (1986) notion of superior expectations in strategic factor markets.
Carpenter Strategy Toolbox 