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This Cost Comparisons activity also includes:
Our final proposal for the cost of the bridge requested is ... In the last segment in a series of 10, pairs work together to develop a proposal for a city bridge design. The class completes a cost comparison between concrete and steel to assist with estimating materials cost. The completed proposal includes a sketch of the design, a budget, time frame, and any specific design characteristics.
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CCSS:
Designed
Concepts
Instructional Ideas
- Ask a civil engineer to review the proposals
- Acquire actual construction proposals to share with the class
Classroom Considerations
- The teams should already have knowledge of bridge construction
Pros
- The worksheet walks the teams through the calculations needed for their proposals
- The cost comparison worksheet comes with an answer key
Cons
- The activity does not require the teams to think about the forces the bridge may need to withstand to determine the appropriate material