This study explores the ideas of Greek prospective primary teachers about the anthropogenic greenhouse effect, particularly about its causes, consequences and cures. For this purpose, a survey was conducted: 265 prospective teachers completed a closed-form questionnaire. The results showed serious misconceptions in all areas (causes, consequences…

This paper describes the structure of the "Air Pollution Course", an environmental science laboratory course developed at the Science Education Laboratory of the Faculty of Primary Education, University of Athens, as well as the findings resulting from its implementation by pre-service elementary teachers. The course proposed in this…

This paper reports on an investigation of the effectiveness an intervention using several different methods for teaching solution chemistry. The teaching strategy comprised a four-step approach derived from a constructivist view of learning. A sample consisting of 44 students (18 boys and 26 girls) was selected purposively from two different Grade…

The concepts behind the technology of genetic modification of organisms and its applications are complex. A diverse range of opinions, public concern and considerable media interest accompanies the subject. This study explores the knowledge and attitudes of science teachers and senior secondary biology students about the application of a rapidly…

This paper reports on an investigation of the effect of conceptual change pedagogy on students' conceptions of "rate of reaction" concepts. The study used a pre-test/post-test non-equivalent comparison group design approach and the sample consisted of 72 Turkish grade-11 students (aged 16-18 years) selected from two intact classrooms.…

Suggests teaching strategies for overcoming the lack of student understanding of the principles of the bubble photometer by helping students compare the bubble photometer with the weighing method, develop the concept of assumptions, and resolve cognitive conflicts. Uses an interactive activity to help students expose their preconceptions.…

This paper reports on a study conducted among Greek kindergarten teachers aiming to explore their conceptual frameworks on a major environmental issue of our times: the ozone layer depletion. The choice of this particular issue was premised on its novelty, complexity and abstractness which present teachers with difficulties in its teaching. A free…

Uses a free-form questionnaire to explore 10- and 11-year-old students' ideas about the nature of air pollution and its biological and physical effects. Suggests that students hold misconceptions in this area. (DDR)

Examines the effectiveness of an analogy activity designed to overcome junior high school students' misconceptions about the microscopic views of phase change. Uses an analogy activity presented in the form of role playing in which students act as particles. Contains 32 references. (DDR)

Assesses the subject-matter competence in physics of inservice junior secondary science teachers in Hong Kong. Concludes that teachers lack subject-area knowledge. Discusses general implications for educational improvement. Contains 41 references. (DDR)

Investigates reasoning strategies students use in solving stoichiometric problems and explores the relation between these strategies and alternative conceptions, prior knowledge, and cognitive variables. Results show how stoichiometric relations produce conflicting situations for students leading to conceptual misunderstanding of certain concepts.…

Reports on a study of alternative conceptions held by junior high-level secondary science teachers enrolled in an inservice teacher-training program. Finds that science teachers are inadequately prepared to teach a broad and balanced science curriculum. Contains 34 references. (Author/WRM)

Presents the application of decision-theoretic technique to a computer-based tutoring system for elementary mechanics. Uses sound probabilistic reasoning and a student model to identify learners' misconceptions. Focuses on the integration of Bayesian belief networks, item response theory, decision analysis, and database management systems in…

Discusses the results of a four-year study of the conceptions of energy held by science teachers in training. Concludes that the group held a number of different alternative conceptual frameworks. Contains 20 references. (DDR)