1.)Students are given a lab sheet (see attachment tragedy of the commons.doc).
2.)ROUND 1: Students need to be divided into groups of four. Each person represents the head of a household that must be fed. The only food source is a small pond that can only hold 16 fish. The pond begins with 16 fish and is adjusted after each round. After each round of fishing, the fish will double in number (spontaneous reproduction). Each head of the household can take as many fish as they want, but must take more than one to keep their family alive. Each head of the household can only fish for 30 seconds at a time.
3.)The red cup is the common pond. The straw is the fishing pole. The student sucks in the straw until they think they have a fish, then they take the fish off the straw (pole). The M&Ms or Skittles are the fish. The pond should be taken to the teacher after each round of fish so it can "reproduce". (Remember, each fish can double, therefore, 3 fish become 6, 6 fish become 12, etc.)
4.)Each round of fishing, the order should be rotated so that each head of the household gets to go first.
5.)There is to be no talking during this round. The students are not permitted to look in the pond in this round.
6.)There will be 3 rounds of fishing.
7.)Complete the data table (see attachment tragedy of the commons.doc) after each round of fishing.
8.)ROUND 2: In this round there will be the commons pond (red cup  same rules as last time) and a private pond (blue cup  one pond per student). The students can talk in this round and look in the pond while they are fishing. It will be possible to see how many fish are available at all times. The private pond has a capacity for only 4 fish. The common pond still begins with 16 fish. You must take at least one fish from each pond each round. You may remove as many fish as you wish from each pond, as before. The ponds will reproduce (take to teacher  same as last round) after each round.
9.)Complete the data table (see attachment tragedy of the common.doc) after each round of fishing.
10.)Upon completion of round 2 students should answer questions in the analysis section of lab sheet (see attachment tragedy of the commons.doc).
11.)Students should choose an environmental management issue where "tragedy of the commons" is relevant. This should be presented to the class in the form of a brochure, PowerPoint, or mock newscast.
12.)Lab is graded for correctness.
13.)Presentation is graded according to rubric (see attachment tragedy rubric.xls) ( Rubistar) Allows you to create your own rubric to meet your criteria.
