Results of a study investigating the nature of secondary school pupils' difficulties in understanding the concept of water potential are presented. Provides examples of common misconceptions. (CS)

Describes results of a study investigating the nature of Nigerian secondary school pupils' (N=120) difficulties in understanding the biological concepts of growth, reproduction, and transport mechanisms within living organisms. Identifies examples of common misconceptions. (CS)

The author appraises the new materials for ages 9-11, "Nuffield Combined Science Themes for the Middle Years," and reflects on teaching tactics for the 1980s. (Editor/SJL)

Provides an overview of innovations in the teaching of chemistry at all levels in the United Kingdom, emphasizing recent changes in chemistry in the secondary schools. (CS)

Presents some of the preliminary results of a survey study about the use of both the revised publications and GCE O-Level examinations for Nuffield Chemistry in 495 British schools and colleges in 1979. (HM)

Presents nine physics notes for British secondary school teachers. Some of these notes are: (1) speed of sound in a steel rod; (2) physics extracts-part four (1978); and (3) a graphical approach to acceleration. (HM)

Reports results of a study that examined (CSE) biology examinations to determine whether practical and theory examinations tested separate constructs. Multitrait-Multimethod matrices revealed evidence of convergent validity between two practical tests forming part of the same examination. Practical tests and written papers show very limited…

Presents questions and answers about the fluoridation of water regarding the compounds added to drinking water in the fluoridation process, how raw water is tested for fluoride content, and how fluoride reacts with tooth enamel. (CS)

Describes a general chemistry experiment involving gas law calculations, utilizing Alka Seltzer as a source of carbon dioxide. (CS)

Presents the "extended discretion" approach as another dimension to conventional biology laboratory investigations. Results of a study comparing this approach to BSCS investigations indicate that tenth-grade students can handle increased discretionary demands related to their learning activities, thus encouraging responsibility and…

Described is the use of cartoons in the science classroom to: (1) introduce new topics of study; (2) present students with problems to solve, activities to perform, or situations to analyze; (3) simulate discussion about values, science, and society and (4) convey messages about the nature of science. (Author/DS)

Summarizes opening remarks made at the sixty-third meeting of the Chemical Institute of Canada in a panel discussion on the subject of teaching electrochemistry. (CS)

An elementary organic review exercise is described which can be given to a secondary school student who has completed an elementary unit on the chemistry of carbon. This is recommended as an exercise, not a test, but can be utilized for evaluative purposes. The format includes both multiple-choice and essay questions. (DS)

Provides an explanation for the apparent emission of x-rays from video display terminals. (CS)

Lists alphabetically by author the articles, notes and letters published in Volume 18 of the "Physics Teacher." (CS)