This lesson is optional because it does not address any new mathematical content standards. This lesson does provide students with an opportunity to apply precursor skills of mathematical modeling (MP4).

In previous lessons, students learned how to measure lengths using rulers marked with halves and fourths of an inch. They also learned about using different units to measure and estimate weights, liquid volumes, and times, and used the four operations to solve problems involving measurement. In this lesson, students continue to work with the context of a fair. Students analyze games they might see at a fair, such as a penny toss or marble run, and consider what makes a good game. They then create their own games with given materials and integrate mathematical ideas from this unit. Students play the game and consider ways to improve it.

This lesson may take more than 60 minutes, as students may need additional time to design, set up, and play their games. Consider modifying the activities or expanding the lesson across 2 days to meet students’ needs or to give more time for revision.