Name:  Amy Craig and Jaima Winger   Topic:  Windmills   Grade Level:  Fifth Grade ITDPT 364-6

Source:
Holt, Rinehart and Winston.  Science Plus Technology and Society.  Chicago:  Harcourt Brace Jovanovich,  1993.

Materials:
--K'nex toys
--paper of cardboard to attach to blades
--string
--100g weight
--fan
--stand (if needed)

Objectives:
The students will design a windmill using K'nex toys.  They will make a design that will riase a 100g weight when moved by a fan.  Students will record their findings, and write suggestions on how to improve their design.

Procedure:
1--Students will decide what is the best design for their windmill
2--Students will hypothesize which angle and length of the blade they think will work  best for                 their design.
3--Students will try out different angle sizes and blade lengths.
4--For each desin students will record their findings, make notes, and suggestions as to  how to improve their windmill.  This will be turned into the teacher.
5--Once students have found their best windmill design, they will test their windmill for  the class.
6--They will try and raise a 100g weight by turning the windmill with a blowing fan.

Evaluation:
The students will be evaluated by how well their windmill lifts a 100g weight when turned by a fan.  Students will also be graded on the paper in which they recorded their suggestions and findings.

Re-design:
After demonstrating their windmill for the class, students will be able to make alterations based on the success of their windmills.
          
       
 
Windmills