```Sky HighGladys Allen                   Louis Wirth Experimental School                               4959 South Blackstone Ave                               Chicago IL 60615                               (312)535-1410Objectives:

This lesson is appropriate for students in middle and junior high.
The students will be able to work cooperatively in small groups.
The students will be able to convert centimeters to millimeters, meters to
centimeters, meters to millimeters.
The students will be able to graph the width and the height of their tower.
The students will be able to tell the teacher if there is a mathematical
relationship between the height and the width of the base.

Materials Needed:

Straw
Paper Clips
Meter Sticks
Graph Paper
Worksheet of instructions

Strategy:

Give each small group a minimum of 30 straws and a box of regular size paper
clips.
Using the materials they are to construct a structure in fifteen minutes.
Measure the height of all the structures in millimeters, that are standing
without assistance.
Convert measurements to centimeters and meters.
Measure the width of the base at its widest point in millimeters.
Convert measurements to centimeters and meters.
Enter data on graph provided by the teacher.
After observing the data make a judgement if there is a relationship between
the width of the base and the height obtained.

Performance Assessment:

HANDS ON PERFORMANCE-ASSESSMENT FOR STRUCTURES

Points
5  points EXCELLENT - Works cooperatively in small group; Measures accurately;
Completes conversion tables; Contributes to class graph;
Answers questions and draws a logical conclusion.
4  points VERY GOOD - 4 out of 5 items previously stated.
3  points FAIR      - 3 out of 5 items previously stated.
2  points POOR      - 2 out of 5 items previously stated.

Conclusion:

This activity is best used with students who have been introduced to the metric
conversions.  It also incorporates many subject areas that lend themselves to
math.  This is a good introduction to advanced areas of study such as physics
and architecture.

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