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Form your groups of three.

Choose a clipboard for your group to use (down the bottom of the page).

Choose a group name.

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The aim of the game is to devise a strategy to use a renewable resource (the marbles) over a 10-year period (the 10 rounds).

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-> The idea is to take as many marbles from the bowl as possible over 10 rounds.

-> If you take all the marbles before the last round, your group is out of the game (because the resource would not be sustainable).

-> The number of marbles you take out can vary by only one from the previous round.
e.g. if you took 1 marble from the previous round, you can take only 0 or 2 marbles the next round.

-> At the end of the round, you must put back: 1 marble for every 4 marbles left in the bowl.
e.g. If there are 11 marbles left, you put back 2 marbles.

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Record the number of marbles the group takes out each round on the table provided below.

Upload this onto your group's allocated clipboard.

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In your groups, discuss the following questions and write the answer on the comment boxes below:

1) What is the most marbles you can take out of the bowl year after year and still have marbles left?

2) Compare the strategy your group used with the strategies used by other groups.

3) Explain how the game models the sustainable use of renewable resource.

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THE RENEWABLE RESOURCE GAME

Record the number of marbles the group takes out each round on the table below.

| YEAR (rounds)  | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10

| REMAINING RESOURCES (marbles) |  20 |  18 |  17 |  15 |  13 |  10 |  7 |  5 |  3 |  0
| USED RESOURCES (marbles) | 4 |  5 |  4 |  5 |  4 |  3 |  4 |  3 |  2 |  1

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