Various science experiments using ordinary bottles are discussed. (CP)

File folders can be used effectively to develop and retrieve information about animal classification systems. Animal characters are drawn separately on the front side of a file cover and holes are punched next to each character. (PS)

Describes five activities designed to help students recognize and appreciate the factors directly involved in the process of fossilization. (JR)

Advocates the use of cartoons in science textbooks as a means of presenting scientific concepts in a humorous manner and motivating students. Five cartoons from the Project Physics textbook are presented with descriptive comments. (JR)

Describes techniques using everyday examples and analogies which aid students in distinguishing between two terms with opposite meanings, such as anticline and syncline. (PS)

Describes various activities to understand the nature of the earth as a spaceship and its impact on human life. A figure depicting a holocoenotic environmental complex is given which can be used to illustrate various interacting forces on earth. (PS)

Describes eighteen ways in which balloons may be used as a teaching tool in demonstrations and discovery exercises in science. (JR)

Provides a detailed explanation of the metric system as well as the historical basis for its development and cites the advantages of using the system over the one presently in use. (BR)