Describes an open-ended interdisciplinary activity in which students construct a model of an island and then investigate real-life problems and other student selected island projects. Emphasis placed on problem solving. (BR)

Describes a science activity in which sixth-grade students, using tookpicks and spherical breakfast cereals to construct molecular models, discovered that compounds with the same molecular formulas can have different structural formulas and therefore different physical properties (isomerism). (JR)

Describes a project making a model of the celestial sphere that will show how the ancients imagined the universe. (PR)

Presents a model by which teachers can plan science activities for unmotivated students. The student-centered curriculum is briefly outlined with references and a variety of teaching materials are listed. (SA)

Presents an activity that models the changes in the concentration of carbon dioxide gas in the atmosphere during the last 200 years as determined from glacial records. (PR)

Provides background information on landfills and describes an activity where students learn how a modern landfill is constructed and develop an understanding of the reasons for several regulations regarding modern landfill construction. Students design and construct working models of three types of landfills. (PR)