1. This small group activity is designed to provide students with practice in using a change of variables procedure for partial derivatives and total differentials.
  2. Students use the variables from the Partial Derivative Machine (PDM) to practice the mathematical technique of change of variables when given a partial derivative that cannot be explicitly measured.
  3. The whole class discussion focuses on how students manipulated the mathematical quantities to arrive at a total differential from which they could successfully extract the requested derivative.

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