This publication provides information and activities for teaching concepts about machines and process skills including observing, classifying, collecting and interpreting data, inferring, measuring, and predicting. There are 15 lessons. Lessons 1 through 5 deal with what machines are, measuring force with a spring scale, working with a lever, measuring force on a first class lever, and a second kind of lever. Lessons 6 through 10 pertain to activities on the wheel, the wheel and axle, gears, a fixed pulley, and a movable pulley. Lessons 11 through 15 are concerned with concepts involving the inclined plane, wedges and screws as inclined planes, compound machines, and a review exercise of what was learned in the unit. Also contained in the packet are: (1) a list of materials needed for activities; (2) information on the use of process skill terminology; (3) a list of objectives by lesson; (4) a vocabulary list with definitions; (5) teacher background information; and (6) worksheets, three quizzes, and a unit test. (RT)