Presents a classroom guide for a simple theoretical approach to the study of certain fluids. Discusses background information, followed by experimental procedures for the preparation of two popular viscoelastic materials ("Slime" and "Silly Putty") that exhibit unusual flow properties. Also lists student discussion questions…

Presents an activity in which students attempt to design a fair test--a test in which one variable at a time is changed--that will result in the slow melting of a single piece of valentine heart candy in the mouth. Students identified and defined "normal placement" as a control variable and measured melting time to establish baseline data. (WRM)

Describes educational toys that are made from natural and readily available materials in Ghana. Directions and diagrams for the pawpaw-leaf horn, milk-tin helicopter, pen-top propeller, bow and arrow, spinning top, and feather helicopter are included. (DDR)

Presents four stories of teachers and learners engaged with natural phenomena. Relates stories of elementary students' inquiry into ecosystems, sound, and matter, and college students' inquiry into the moon. Includes a set of guidelines for helping teachers characterize inquiry in their own classrooms. (Author/WRM)

Argues that the Woesian three domain view of life should replace the five kingdom taxonomic scheme presented in most general biology texts and courses. Presents evidence for employing the three domain scheme and a related activity for classroom use. Contains 11 references. (WRM)

Describes a microcomputer-based laboratory experiment designed for high school students that very accurately analyzes Faraday's law of electromagnetic induction, addressing each variable separately while the others are kept constant. (Author/CCM)

Dynamic field maps and contour curves provide a new way of depicting and analyzing the electric field of uniformly moving point charges. Presents an alternative way of graphically representing the electricity field of a uniformly moving point charge. (CCM)

Argues that using in-class worksheets are versatile and can be tailored to meet specific goals. Finds that worksheets are effective for confronting preconceptions, ensuring class participation, and increasing student/teacher interactions. (CCM)

Describes how students in an introductory physics and astronomy lab used computer and data interface units to sample a 15 second portion of a prerecorded audiotape of two broadcast stations to measure the speed of light. (CCM)

Finds that few electricity and magnetism experiments make use of computers for data acquisition. Reports on the use of a Vernier system for the measurement of the RC time constant for the charging and discharging of a capacitor. (CCM)

Describes how to teach the light spectrum to students using hands-on activities in a physical science class at the middle school level. Explains how to build a spectroscope and lists required materials. Provides an internet address for sciLinks. (YDS)

Presents a lesson on rockets and provides information on how to build a water rocket. Discusses the safety procedures necessary during loading and launching. Explains how to grade students on their projects. (YDS)

Describes the care and breeding of zebra fish, suggests various experiments and observations easily performed in a classroom setting, and provides some ideas to further student interest and exploration of these organisms. (DDR)

Describes a research-based activity for high school physics students in which they build an LC circuit and find its resonant frequency of oscillation using an oscilloscope. Includes a diagram of the apparatus and an explanation of the procedures. (DDR)

Points out the difficulties students have in making connections from the DNA molecule to a phenotype. Presents an activity in which students imitate the actions of functional and nonfunctional enzymes and examine the phenotype of organisms of different genotypes. (YDS)