This action research study evaluated problem-based learning (PBL), traditional lecture, and a combination of PBL and lecture in an elective biochemistry course at a secondary school for gifted students. Lecture tended to wide content coverage, whereas understanding and retention was promoted by PBL. (Author/DB)

Considers the possible relations among instruction, content, and assessment. Presents a rationale for and examples of demonstration-based testing activities. Highlights student performance and reaction to these assessment methods. Contains 13 references. (JRH)

Shares perspectives on what is happening at the national level in science education reform, why reform is needed, and the role that environmental education can play in this reform effort. Contains a discussion of the recent changes in science content and instructional goals. (DDR)

Addresses the problem of relating distance and scale by way of alternative models of perception taken from the history of science. Makes specific suggestions to broaden the scientifically-based actual activity zone of students. (Contains 19 references.) (DDR)

Describes an inquiry-based scooter activity in which students learn the mathematical concepts of measurement and proportionality and the science concepts of force, motion, velocity, and acceleration while using their problem solving skills. Explains strengths and weaknesses of the activity and includes suggestions for assessment. (YDS)

The Individualized Eclectic Examination is described. The format, design, and philosophy of the examination that emphasizes problem solving are discussed. Sample questions, student projects, and an illustration of the implementation of the exam are included. (CW)

Examines the relationship of the amount of available short-term memory with the complexity of tasks the subjects mastered. Presents some hints for a better design of instruction. (YP)

Investigates high school students' understanding of the physical relationship of chromosomes and genes as expressed in their conceptual models and in their ability to manipulate the models to explain solutions to dihybrid cross problems. Describes three typical models and three students' reasoning processes. Discusses four implications. (YP)

Describes a computer program presenting four genetics problems to monitor the problem solving process of college students. Identifies three main areas of difficulty: computational skills; determination of gametes; and application of previous learning to new situations. (Author/YP)

Describes a model that teaches a problem-solving process and provides students with the opportunity to practice, develop, and enhance their thinking skills. States that applying learning to real problems is needed to increase a student's thinking ability. Provides diagrams of the problem-solving cycle and levels of thinking. (RT)

Describes a module in which students seek to gain an understanding of factors that interact in the ecological system of their school. Presents sample questions for use in reinforcing concepts and evaluating student learning, directions for four task activities, and topics for some of the remaining task activities. (RT)

Describes the nature of cognitive research. Misconceptions research in mechanics and electricity are reviewed. Research results on expert/novice differences in knowledge organization and problem solving are reviewed. Implications for classroom teaching are discussed. Lists 34 references. (YP)

Develops an experimental teaching method emphasizing the nature of functions including graphical representation in an introductory college physics course (mechanics). Examines the effects of this method on student's problem solving and attitude toward physics. (YP)

Uses case studies to explore the pedagogical reasoning ability of second-year preservice primary teachers. Reports that the framework provided in a problem-based science education course enabled the teachers to refine their reasoning ability and to integrate their science knowledge, curriculum knowledge, and knowledge of learners. (Author/JRH)

From a study of students in 7th through 12th grade it was concluded that salient external features of the problems, as well as factors related to the solver largely influence students' responses to the problems. The theoretical framework, however, is not the most influential factor in determining students' responses to the problems. (PR)