Presents few ideas and tips on demonstrations for secondary school teachers; the concept of one part per billion, the running flame tests, models of atoms and molecules. Supplies the names of some useful high school science books. (GA)

Discusses some of the ways that some scientific concepts evolve and are perpetuated, even if they are not completely accurate. Uses the example of groundwater, citing numerous ways that various people understand it and, in many cases, form misconceptions. (TW)

Presents an ethnographic study of whether a heterogeneous group of Sotho people in Southern Africa continues to subscribe to a particular cultural metaphor concerning heat, even though the group is no longer strictly traditional in its way of life. Considers implications of the metaphor's persistence for the learning of orthodox scientific…

Describes a demonstration procedure using controlled reduction potentials to predict observed color changes which are then experimentally verified. Demonstrates the usefulness of this procedure in helping students understand LeChatelier's principle and the solubilit rule "like dissolves like." (CW)

Research focused on two factors that may be influencing females in choice of careers. Factors are role-specific self-concept in science and self-perception in terms of stereotypical masculine and feminine characteristics. Logical ability and mathematics and science courses were also examined as factors in career choice. Results of data for 177…

Discusses the use of analogies and models for teaching about electric current. Reports on a study in which one group of students used analogies to learn about electric current and one did not. Results indicate that, in this case, analogies did not play a significant role in student understanding. (TW)

Reports on a study designed to examine students' understanding of certain aspects of heat, pressure, and evolution. Results indicated that little change was apparent over the two-year period of the study, with most of the students in the 12 to 14 age range at the same conceptual level as the 14 to 16 year olds. (TW)

Describes an instructional framework based on concepts of energy, ecosystems, carrying capacity, change, and stewardship. Stresses the importance of determining what is really important (basic) for each student to experience or learn in relation to each concept and grade level. Student-centered learning activities and sample lesson on energy…

A brief review of the mole concept and its application is given, major problem areas are highlighted, and suggestions are made for a unified approach to alleviate some of the student misunderstanding when preparing solutions, calculating concentrations, and determining effects of dilution. (Author/JN)

Investigated students' (N=43) conceptions of what happens when water boils, evaporates, and condenses, and when ice melts. Results obtained from clinical interviews indicate that childrens' conceptions are quite different from those of scientists and that their ideas can sometimes be influences in unintended ways during instruction. Implications…

There is nothing in the theory of language teaching which prescribes that communication skills need be acquired through any specialised context in order to be used in that context. In the teaching of scientific English, not only scientific topics but a whole range of motivational stimuli can be tapped. (Author/CFM)

In this activity, students learn how paper is made by working together to make their own paper. Students are introduced to the concept of recycling: what it is, its importance, and how it affects their lives. This activity is uses a time frame of 40 minutes. (Author/SOE)

In this activity, students learn about composite materials, tension as a force, and how they act on structural components through the design and testing of a strip of plastic chair webbing. This activity requires a 60-minute time period for completion. (Author/NB)

Science has many explanatory concepts that have been proposed to account for the observable features of things. Such explanatory concepts often have associated with them hidden or unseen "theoretical entities." The electron is a key concept in understanding phenomena described by science. The question arises, however, as to how students…

This 23-minute videotape takes children, grades K-4, on a tour of the nine planets of our solar system and explains vital statistics and interesting facts about each. Key terms such as rotation, revolution, and orbit, are explained. A hands-on activity that can be used to demonstrate how Saturn's moons actually create its beautiful rings is also…