This brief (2 pages long) script on Simple Machines has 20 solo speakers and many parts for ALL so that teachers can use it with a whole class. (Note: You may add or subtract solo speakers to customize the script for the size of your group.) Using an infomercial context, this script provides a brief overview of information about these 6 types of simple machines: Inclined plane, Wedge, Screw, Lever, Wheel and Axle, and Pulley.
Reading and rehearsing the script familiarizes students with some bas