This discussion of ways to use spirolaterals in the classroom includes making conjectures, hypotheses testing, and proofs, as well as a number of examples. (MP)

A systematic search is given for products where reversing the digits does not change the answer. Related questions are suggested that can be solved by the same discovery approach. (MP)

An activity unit is described that helps children recognize the inside and outside of closed curves. (MP)

Provides information on air pollution for young readers. Discusses damage to substances and sickness from air pollution, air quality, and what to do in a pollution alert. Includes questions with answers, illustrations, and activities for the learner. (MA)

Two inquiry-oriented lessons that involve students in numerous computations, but are also enjoyable mathematics activities, are described. Drill activities are camouflaged by the challenge of a game. (MP)

A number of activities are outlined for the use of regular playing cards to teach and reinforce certain mathematical skills. (MP)

Instructions and materials are given for an activity designed to help students become familiar with the metric system. The game emphasizes the relationship between metric units. (MP)

Enrichment activities are scrutinized and three criteria are derived: improvement, ornamental, or fertilization. Four stages of responses to such activities are discussed. (MP)

Describes an experiment to characterize the enzyme polyphenol oxidase. Includes Purpose, Reagents and Equipment, Procedure, Extraction, Treatment of Data, and Discussion. (MA)

Describes the use of student-made photomicrographs as a source of student motivation and as a means for review of laboratory exercises in an introductory microbiology course. Includes an evaluation of this teaching method. (Author/MA)

In using mobiles as a lesson in a high school sculpture class, two important factors, necessary for a successful project, were discussed. One was motion, the other the level of sophistication desired. Students developed complex concepts while learning to appreciate the construction of a mobile. (Author/RK)

An egg-drop project, illustrating Newton's Laws of Motion, is described. (DT)

A series of lessons concerning money and place value is described and instructional techniques are analyzed. (DT)

Ways in which elementary children can learn the concept of "zero" are described. (DT)

Painting a cube, breaking it into smaller cubes, and finding how each of the smaller cubes is painted are used as the basis for a geometry activity. (DT)