Describes experiments by Thomas A. Knight on geotropism. These experiments took place about 200 years ago and used a centrifuge. (PR)

The science trade books that appear in this annotated bibliography are recommended for Spanish-speaking students. (PR)

Describes an interview-a-scientist assignment for preservice elementary teachers. Preservice teachers realized that scientists frequently repeat experimental work, that science is not neat and tidy, and that science requires patience and perseverance. (PR)

Describes using the aquatic plant, duckweed, for open-ended investigations and learning about factors important in photosynthesis. (PR)

Students experience the distinction between observable fact and scientific theory by taking a critical look at how spaghetti can be sucked up into the mouth. A demonstration shows that air is needed to suck up the spaghetti but that the scientific explanation is not as simple. (MDH)

Presents an activity in which students model the processes of meiosis, fertilization, development, and birth using model creatures called reebops. Students breed reebops to analyze chromosome combinations. Makes recommendations for activity utilization and identifies the strengths of the activity. (MDH)

Describes activities in which students learn that it takes teamwork, problem solving, and personal commitment to save the environment. (PR)

Outlines the stages of a cell biology "pulse-chase" experiment in which the students apply autoradiography techniques to learn about the concept of the cell cycle. Includes (1) seed germination and plant growth; (2) radioactive labeling and fixation of root tips; (3) feulgen staining of root tips; (4) preparation of autoradiograms; and…

Describes using the common house plant, "Coleus blumei," to illustrate gravitropic effects, phototrophic effects, and hormonal effects in plants. (PR)

Proposes that schools declare April as "Earth Month." Explains how to get started and ways to get students excited. Describes environmental lessons and integrated activities. Provides the addresses of six sources for environmental education resources.(PR)

Provides reasons for pursuing interdisciplinary study, reviews past interdisciplinary efforts, presents in detail a course model, and summarizes student and faculty reaction. (PR)

Describes how spreadsheets can be used for helping students learn about direct current electrical circuits. (PR)

Explains how tradebooks can be used in science instruction. Presents lists of tradebooks for teacher use to (1) lower abstraction, (2) develop skills and talents, (3) enhance self-esteem and social skills, and (4) measure mastery through alternative assessment activities. Also presents lists of tradebooks for student use. (PR)

Explains how the "three D's" of ecology; diatoms, density, and diversity; can be used to generate student enthusiasm and spur investigations that can be conducted during student's own time. (PR)

Modeling is important in science and in science education. Computer-based modeling opens up new possibilities for learning science, particularly now that appropriate software is available. This article describes high school students' use of Model Builder software in high school classrooms. (PR)