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Uw: Econ Research Lesson on Diminishing Returns & Increasing Marginal Cost
This site offers a lesson plan designed to teach the concept of "marginal productivity" by having students produce "textbooks" in a simulated factory. Directions, charts, and questions are provided.
Econoclass
Econoclass: Birka: A Strategic Trading Game
This game, using multiple decks of playing cards, teaches the concepts of marginal benefits vs. total benefits. Each game takes about 10 minutes to play.