Differentiation Have students play the game in pairs, rather than as individuals, with students in each pair sharing the work of reading the instructions, throwing the die, and recording the carbon pools that they visited on the tracking sheet. Modifications Extending the Learning Use Slides 15-16 (hidden in the PPT) to explain that the Carbon Dice game was a model, and therefore has some limitations when representing actual ecosystems. Ask students to brainstorm ways that a real ecosystem differs from the model ecosystem and share their ideas with the class.