Provides instructions to construct a device that measures air pollutant concentrations using an inexpensive modified portable aerator. Describes sampling strategies by which students examine the concentrations of pollutants in school and industrial settings. (MDH)

Describes a hands-on simulation in which students determine the age of "fossil" pollen samples based on the pollen types present when examined microscopically. Provides instructions for the preparation of pollen slides. (MDH)

Describes a creative project for anatomy and physiology students in which students make a collage of the integumentary system. Includes guidelines that address the collage's size, composition, content, clarification, and grading. (MDH)

Presents a singular alternative to the Indole Methyl-red Voges-Proskauer Citrate (IMViC) test that uses bile-esculin agar to distinguish between the Escherichia coli and Enterobacter aerogenes bacteria. Includes materials and methods, results, and conclusions for the test. (MDH)

Discusses the benefits of videomicroscopy and explains how a simple camcorder-microscope setup can be used as a less expensive alternative. (PR)

Argues that scientific literacy requires that students know how to apply scientific theories and that the skill of theory articulation has to be taught explicitly. Analysis of textbooks and tests indicates that this is not currently done. Offers Roger C. Schank's theory of explanation as a starting point to develop that skill. (Author/MDH)

Describes an experimental system that allows students to observe pollen tubes in vitro and to investigate a variety of aspects of pollen tube-style interactions. One interaction provides an example of postmating reproductive isolation. (MDH)

Shows how fruit flies can be used in the teaching genetics laboratory to correlate the principles of heredity with the modern understanding of enzymes. (Contains 16 references.) (MDH)

Describes concrete demonstrations on the states of matter. In the first demonstration, students represent molecules; and, in the second demonstration, moth balls are heated to produce a change of state. (PR)

Describes an activity for helping students understand and use data tables. (PR)

Discusses and explains early people's fears and explanations of eclipses. Describes the lunar eclipse scheduled for November 28-29. (PR)

Describes making a magnetic pendulum similar to those seen in novelty shops. Presents an open-ended activity and a more structured activity using this pendulum. (PR)

Describes the Russian approach to integrated science education and discusses new ideas that Russians are working on. (PR)

Describes an award-winning bulletin board for introducing a unit on reptiles. This interactive bulletin board contains fun facts and counters common misconceptions about reptiles. Twelve true-false statements are hidden behind pull-up flaps. Four pictures ask students to identify the difference between often-confused animals. (PR)

Describes an activity that challenges students to make an object that, when released under water, does not float up or sink down. The main concept this activity investigates is the density of ordinary objects in comparison to the density of water. (PR)