Describes how teaching a lesson on the discovery of a crater in the Yucatan Peninsula and the rock strata deep in the ocean can help students explain the demise of dinosaurs. Discusses the impact theory and the core model. (DDR)

Describes a yearlong project that involves biology students in monitoring water quality. Includes details of the awareness phase, action phase, and presentation phase. Discusses student reaction to the project. (DDR)

Describes changes to a traditional study of population in yeast colonies. Changes to the procedures include: (1) only one culture per student team; (2) cultures are inoculated only once; and (3) the same tube is sampled daily. (DDR)

Presents details of how a local stream is studied as part of a ninth-grade science curriculum, the goal of which is to learn about the school's ecosystem. Provides examples of specific group projects related to the stream. (DDR)

Explains the process of student and teacher collaboration on a project to develop a faster electrolysis mechanism. Provides a good example of the problem-based approach to science instruction and curriculum. (DDR)

Details a project in which students assess the health of two seemingly different streams by conducting chemical and biological tests. Focuses on student and teacher use of a watershed educational project in Tennessee. (DDR)

Describes student work in collecting data about the Fresh Kills landfill in Staten Island and how their research contributed to the decision to close the landfill. Includes discussion of research into other trash alternatives for the area. (DDR)

Explains the origin and purpose of the National Science Education Standards. Defines what is meant by the term standards and describes the function of the National Science Education Standards as contributing to the development of a scientifically literate population. Contains 22 references. (DDR)

Clarifies the position of the National Science Teachers Association (NSTA) on informal science education. NSTA support of all elements of informal science education is strong and this position statement includes many specific examples of informal science education. (DDR)

Documents the process of building an area at a school that allows students to gain an appreciation of biology outside the classroom. Discusses several issues that should be considered before undertaking such a project. (DDR)

Argues that ongoing cooperation between teachers and maintenance personnel is required when planning and implementing schoolyard projects. Reviews planning, safety, and physical security considerations. (DDR)

Describes a project in which teachers concentrate on providing hands-on learning and work with students to build a nature center. Students participate in the planning, implementation, and evaluation phases of the project. (DDR)

Discusses two theories of cognitive development, Ausubel's theory of verbal learning and Piaget's development theory. Illustrates that both concept mapping and the learning cycle are rooted in these two theories. (DDR)

Outlines the development and implementation of a project in which students work in groups of two or three to research, design, and build a display about a geologic time period or a topic related to the history of life on Earth. (DDR)

Explains how a curriculum is integrated across subject areas with strands of career awareness. Focuses on a course known as Connections, a combination physical science, geometry, and English course that shows students how course content relates to possible careers. (DDR)