By the end of the lesson, students should be able to:
Students will be able to:
Bridge design has changed and improved over time.
The “clapper bridge” is one of the earliest types of bridges. This is a low bridge that is made of flat stones or logs. The “clapper bridge” is a natural bridge.
Ancient Romans refined bridge building. They used the arch design and incorporated natural cement.
Asians used a cantilever design which allowed them to build over long spans.
The Rennaissance had an effect on bridge building in that Leonardo da Vinci and Galileo developed theories about the strength of building materials. This information helped architects make strong structures from light materials such as metal.
Later bridges were built out of iron, instead of stone, brick, clay or timber. The use of metal improved bridge design. The Brooklyn Bridge is one such bridge.
The most recent achievement in bridge building is called prestressing which helps prevent concrete from cracking. Today, most bridges are made of prestressed concrete and steel.
For more detailed information about bridge design and an overview of the forces that affect bridges visit www.engineeringtufts.edu.
Day 1: Planning Day
Day 2: Building Day
Asking Good Questions Video
Students can create a PowerPoint presentation to outline their understandings. You can have them use a digital camera to show their processess in bridge construction and present this to other classes.
Students can create a brochure for a tourist of N.Y.C. The brochure will outline bridges found in the City, describing historical background, forces that affect them, and reason for design.
If you are interested in learning how to make your own rubric for this or other lessons, you may be interested in watching the How to Make a Rubric video below.
Or, you can choose to use or customize the one created for this lesson plan below.
Building Bridges Rubric (PDF)
New York, New York, United States
May 12, 2012 - 2:08pm
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