Discusses long (expanded), short (condensed), and pyramidal periodic table formats and documents events leading to a periodic table in which subgroups (families) are designated with the letters A and B, suggesting that this format is confusing for those consulting the table. (JN)

Following a discussion of the role and importance of practical laboratory tests, describes an instrument designed for inquiry-oriented practical examinations. The instrument consists of 21 categories representing different inquiry skills. Examples and illustrative data based on results in biology matriculation examination in Israel are reported.…

When chitin and chitosan were added to growing cultures of Chlorella containing various quantities of toxic metals (copper and mercury), it was found that the presence of these materials reduced the toxic effect of the metals. Background information, procedures, and results are provided for this experiment. (Author/JN)

Presents an expanded classification of the plant kingdom, emphasizing major evolutionary steps and differences in levels of complexity. Describes subdivisions and suggests that this classification, reflecting unity and diversity, may be logical, understandable, and useful to students. (JN)

Outlines an interdisciplinary workshop in bioethics for secondary teachers taught by a team consisting of a scientist, a philosopher, and a literary critic. Discusses definitions, topics, reading selections, problems, and value. (DC)

Some of the problems encountered in devising sixth-form projects are discussed and a detailed account given of one project in which a study was made of the effect of onion bulb volatiles on the germination of lettuce seed. (Author)

Describes the use of silicon diodes for low temperature thermometry in the teaching laboratory. A simple and inexpensive circuit for display of the diode forward voltage under constant current conditions is described, and its application in the evaluation of low cost silicon diodes as low temperature thermometers is presented. (SK)

While ecology is usually regarded as a subject/topic in six-form biology teaching, it is recommended that it be treated as a joint theme with physiology throughout the course. This involves a full integration of ecological concepts into other topics with the abolition of ecology as a discrete entity. (Author/JN)

Provides tips for stimulating interest in high school chemistry while imprinting safe laboratory practice. Suggests safe alternatives to potentially dangerous "magic show" and other chemical reactions. Also suggests that safety education be a prerequisite for certification of secondary school chemistry teachers. (Author/JN)

Sixteen films dealing with plate tectonics are reviewed. Each annotation includes length and source of film, general description of content/format, and suggested grade level(s). (JN)

Designed for first-time telescope purchasers, provides information on how a telescope works; major telescope types (refractors, reflectors, compound telescopes); tripod, pier, altazimuth, and equatorial mounts; selecting a telescope; visiting an astronomy club; applications/limitations of telescope use; and tips on buying a telescope. Includes a…

Discusses computer testing and test generation programs, focusing on generating printed tests with the computer and advantages of interactive computer testing over paper/pencil tests (providing that sufficient computer equipment is available to make it feasible). (JN)

Results of a study investigating the effects of three high school courses (science fiction literature course, biology course, and English composition course) on students' (N = 55) attitudes toward science indicated that none of the courses had a measurable effect when pretest scores were compared to posttest scores. (SK)

Two demonstrations are described: (1) red cabbage and electrolysis of water to bring together acid/base and electrochemical concepts; and (2) a model to demonstrate acid/base conjugate pairs utilizing magnets. (SK)

Presents reviews of audiovisual aids for chemistry including format, time, catalog number, price range, supplies, and reviewer's comments. (SK)