IN COLLECTION
Introduction:
 

This lesson will be the introduction for the 8th grade bridge unit. Through the videos and other computer resources the students should have a basic understanding of how bridges work.
 

Group Size: Any
 

Learning Objectives:
 

The students will be able to identify 4 types of bridges.

The students will be able to list the major materials involved in bridge construction
 

Guiding Question:
 

In the 1940s the Tacoma Narrows bridge, also known as "Galloping Gurdy" collapsed. What kind of bridge was this and why did this happen?
 

Materials:
 

Discovery- Understanding Bridges http://player.discoveryeducation.com/index.cfm?guidAssetId=974C3630-156E-4809-9A2E- B81171AEB0B3

PBS- Building Big http://www.pbs.org/wgbh/buildingbig/bridge/

West point bridge builder http://bridgecontest.usma.edu/
 

Procedures:
 

Show students the Discovery video on understanding bridges. This is broken up into 5 parts. Stop between each section for discussion.

The following day use the PBS design challenge and the west point bridge program
 

Assessment:
 

Students will build a bridge out of tooth picks that will hold a minimum of 20 lbs.
 

Answer Key or Rubric:
 

none
 

Benchmark or Standards:
 

Standard 5 for technology- Students will use mathematical analysis, scientific inquiry, and engineering design, as appropriate, to pose questions, seek answers and develop solutions.

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