Topic: In Straws We Truss day 3
Time Duration: 2 hours and 30 minutes
Grades: 1st-6th
Building upon the lesson plan It takes Two to Topple, the lesson will use trusses to explain
the concepts of tension and compression of structures from different forces. The applet will
be used once again to provide a visual of structures. The applet will be used to show how
forces affect different parts of the structures. The students will then build a structure
using straight pin and straws. The structures will then be put under stress from marbles,
and the students will have to explain why their structure failed.