They analyze work and force in relationship to the machines involved. A primary reference book, Focus on Physical Science , and simple equipment are used. A typical activity for each of the simple machines involves the assembly of a model, measurements, and the calculations of work or mechanical advantage. The culminating activity is the Frog Wash which requires the design and construction of a system involving a minimum of three different simple machines which will puncture a water-filled balloon, and shower a plastic frog. Overall Value Highly motivational, this program creates enthusiasm for science using low cost and readily available materials.
Teachers find it easily adaptable and non-threatening.