Describes relatively simple and inexpensive experiments for demonstrating the immune response to honeybee venom in the American cockroach, "Periplaneta americana." (PR)

Provides instructions for teachers and students to culture protozoans for use in science laboratories. Sections include setting up a culture area, basic culture media, amoeba culture technique, powdered milk-wheat-rice medium, alfalfa medium, and uses of the protozoa in the laboratory. (PR)

Describes a technique to isolate unsheared bacterial DNA and subject it to restriction endonuclease enzyme digestion. (MDH)

Recommends the use of constructivist-based strategies to engage students who are not interested in science using traditional methods. Focuses on the application of these strategies in a laboratory experience exploring gas laws. (DDR)

Details a project in which students assess the health of two seemingly different streams by conducting chemical and biological tests. Focuses on student and teacher use of a watershed educational project in Tennessee. (DDR)

Enumerates concerns that educators have regarding the use of student data-collection tools such as the computer-based laboratory (CBL) and the microcomputer-based laboratory (MBL). Compares various types of data-collection technologies. (DDR)

Describes a simple halogenation experiment that can be performed quickly in an open vessel at room temperature with visible light that is appropriate for the beginning weeks of an introductory organic chemistry course. (WRM)

Provides an anthology of references to descriptions of analytical chemistry techniques from history, popular fiction, and film which can be used to capture student interest and frame discussions of chemical techniques. (WRM)

Argues for the use of instruments in introductory level chemistry and presents multiple perspectives on the issue. Reasons for employing instrumentation include the ability of introductory classes to reach a large number of students, the need to model situations in which scientists work, and student expectations regarding the use of technology.…

Outlines the aims and principles underlying recent reforms in the junior school physics course in China. Focuses on developing students' abilities and the benefits of experimentation rather than the simple transfer of knowledge from teacher to students. (DDR)

Explains how students can perform an alternative authentic DNA fingerprinting analysis. Presents restriction fragment length polymorphism (RFLP) analysis and can serve as a simulated molecular epidemiology laboratory or as a simulated forensic laboratory exercise. (DDR)

Describes absorption spectroscopy experiments that allow students to explore the mechanisms by which sunscreens and sunglasses provide protection from ultraviolet radiation. Exposes students to absorption phenomena in an engaging way. (DDR)

Describes the development, preparation, and use of a medium that can select against a wide variety of Gram-negative bacteria while still allowing growth and differentiation of a wide range of Gram-positives. (WRM)

Describes a simple, inexpensive modification that changes a brightfield microscope into a darkfield microscope, allowing low-contrast samples to be examined. (WRM)

Describes the construction and use of an inexpensive, portable photometer designed specifically for estimating population sizes in yeast cultures. Suggests activities for use with the photometer. (WRM)