Presents a framework for model development that, when used, will help the student (or professor) avoid the major pitfalls associated with modeling. Includes not properly identifying the controlling factors, lack of model validation and developing a model that is incompatible with its end use. (CW)

Presents three dimensional models of biological pathways for the following cycles: carbon, nitrogen, sulfur, and a combination of the three. Discusses steps involved in each cycle and breaks each cycle into trophic and environmental regions. (MVL)

This paper identifies five indicators of exemplary efforts and programs that characterize an emerging model for science teacher education reform. These include: (1) defining basic science as content preparation; (2) assessing students beyond content mastery; (3) providing multiple school experiences; (4) working in a semester-long teacher center;…

This paper discusses five specific features of an emerging teacher education model. They include: (1) developing a rationale for teaching science; (2) providing sufficient time for personal change; (3) developing self-analysis skills concerning teaching and learning behaviors; (4) analyzing classroom climate; and (5) modeling teaching behaviors…

There is general agreement that the current teaching of secondary science is not as good as it should be. Different critics identify different weaknesses, but there is agreement that students are not learning how scientists make knowledge claims and use this knowledge. This paper assumes that one powerful influence on the development of teachers…