Investigated concept development related to particulate theory of matter in 130 children (ages 8-12) in two contrasting Warwickshire middle schools. Results are set against background policies/practices in science teaching as revealed by responses from teacher questionnaires (N=60) and analysis of several science curricula. (JN)

Describes how to make the following paper molecular models: trigonal prism; tetragonal pyramid; tetrahedral; and trigonal pyramid. Methodology is given for general paper model manipulation to make various shapes including a chain of tetrahedra and an icosahedron. (MVL)

Discussed are problems encountered when a gas absorption experiment with strong measurement error is used. Notes students either avoid the experiment or report it as defective. Provides ideas to make lab experiments more instructive. (MVL)

Describes a demonstration showing the chemical reversibility between the chromate and dichromate ions. Includes reaction equations and listing of equipment needed. Recommends a demonstration for illustrating Le Chatelier's principle and stoichiometric relationships. (ML)

Examines a solubility laboratory experiment using silver acetate and spectrophotometers for an Advanced Placement chemistry course. Covers experimental procedure, analysis of saturated solutions, and a discussion of chemistry involved. Includes an absorbance curve for silver ions and solution preparation suggestions. (ML)

Reviews factors contributing to the low participation and negative attitudes of girls toward science and contends that science and math teachers play a major role. The author provides a sexism quiz and discussion that enables teachers to assess their classroom behaviors and attitudes toward girls. An extensive bibliography follows the article.…

Examines perceptions of eighth graders in a science teaching environment in which they guide their own learning, frame problems for inquiry, design data collection procedures, and interpret and present data in a convincing fashion. Asserts that, in constructing their inquiries, students successfully negotiated courses of action and established…

Maintains that a major theme in Lev Vygotsky's later research was concept formation or conceptual development in child development. States that Vygotsky argued that the acquisition of mature academic concepts forms the crowning achievement of adolescence. Argues that the view raises a number of criticisms. (CFR)

A study with 45 British undergraduate and graduate science students investigated the usefulness of a semistructured workshop interview to identify students' concept difficulties in chemistry, their understanding of the use of analog models, and other science education issues. Implications for use of the workshop interview technique are considered.…

Concept mapping was used to tap the conceptual disciplinary (science subject) knowledge and pedagogical knowledge of seven biology and six geography teachers with short or long teaching experience. Results indicate that knowledge in both areas is unsatisfactory, experience does not improve the knowledge, and teachers mastered disciplinary…

In 1985, participants in the Second International Science Study developed and evaluated hands-on problem-solving activities and gave students the opportunity to demonstrate mastery of science process skills. Six evaluation stations for fifth and sixth graders are presented: Blowing in a Liquid, Compare and Contrast, Electrical Circuit, Hot and…

Describes the following seven approaches to integrating technology with science education: (1) instructional technology, (2) technology as a method of inquiry, (3) technology as cultural knowledge, (4) technology as vocational training, (5) technological literacy as process and manipulative skill, (6) science-technology-society, and (7) design and…

Explains how computer database technology can be used in the herbarium and be a useful aid in teaching botany and plant taxonomy. (PR)

Presents a simple model that can help students think about evolution and better understand the gradualist and punctuationist macroevolution approaches. The model also improves instruction for concepts of mutation, selection, fitness, extinction, and origin of life. Describes an IBM computer program for instruction in these areas. (PR)

Proposes engaging low achievers in science activities that appeal to their interests. Describes an example involving fishing that explores scientific concepts related to the search for bait, the fishing equipment, the use of solunar tables to determine the best time to go, processing the catch, and survival tips for the trip. (MDH)