We examine how a unique professional learning experience for teachers, which consists of an opportunity to (a) co-design a new instructional model intended to give students opportunities to participate in scientific argumentation, (b) develop instructional materials based on the new model, and then (c) use the materials inside their classrooms, is…

One of the challenges of context-based science education is to construct high quality teaching materials. This paper presents results from a study investigating the heuristic value of an activity-based instructional framework for transformation of authentic scientific practices for use in the science classroom, in line with cultural historic…

Chemistry is a highly abstract discipline that is taught and learned with the aid of various models. Among the most challenging, yet a fundamental topic in general chemistry at the high school level, is molecular geometry. This study focused on developing exemplary educative curriculum materials pertaining to the topic of molecular geometry. The…

Models are essential to the learning and doing of science, and systems thinking is key to appreciating many environmental issues. The National Science Education Standards include models and systems in their unifying concepts and processes standard, while the AAAS Benchmarks include them in their common themes chapter. Hyerle and Marzano argue for…

In order to integrate ideas and information creatively, to motivate students and activate their thinking, we have used in Biology classes a series of active methods, among which the methods of critical thinking, which had very good results. Still, in the case of some intuitive, abstract, more difficult topics, such as the cell structure,…

Outlines the basic ideas which explain the movement of sand in air and water. Uses the behavior of spheres as a model to indicate the behavior of sand grains. (GS)

Describes the cell membrane in detail and presents a mosaic model to explain membrane functioning. (BR)

Lists materials and procedures for constructing a model that demonstrates certain aspects of the Coriolis effect. Materials include an electric drill motor, voltage control, toy dart gun and darts, wood blocks of varying dimensions. Includes description of an experiment illustrating relationship between speed of rotation and amount of apparent…

Cites numerous examples of exceptions to rules which define levels of organization in the biological sciences. Advocates deemphasizing the teaching of the concept of levels of organization because of the ambiguity of the definitions. (CP)

Describes how to construct a model of a DNA molecule with inexpensive materials. (BR)

Describes the application of simulation as a teaching tool which provides a means of understanding living organisms by representing only the essential aspects of selected biological processes which might not be readily visualized. (BR)