This guide, designed for students in grades 3-7, answers intriguing questions about phytoplankton, tiny drifters that have shaped our world. Invisible to the naked eye, phytoplankton are the source of our atmosphere, our climate, our ocean food chain, much of our oil supply, and more. They're also food for zooplankton. Photomicroscopy serves up…

Presents an application of the formulas of kinematics to the real driving situation, involving motion at constant speed and deceleration. Suggests the problem be used as an example in class, a homework assignment, or a test item. (CC)

Describes methods that can be used by beginning chemistry and geology students for growing, cutting, and polishing alum crystals. (JR)

Describes methods and procedures for killing, preserving, mounting, and displaying insects. (JR)

A way of teaching the scientific method to elementary pupils, using animal life collected by students. (SP)

Discusses the phsico-chemical principles underlying fish gas bubble disease and the methods of treating supersaturated water. (CC)

Describes a lesson in aerodynamics'' that involves construction and flying of kites. (SP)

Describes how bottle collecting can be used for serious studies. The emphasis in the activity is on systematic exploration for bottles and identifying the period when the bottles were used. Bottles, one hundred or more years old, can be found in many junk yards. (PS)

Presents a number of classroom ideas including activities related to ecology and chemistry. (DF)