Presented are 27 science activities for secondary school science instruction. Topic areas include microbiology, botany, biochemistry, genetics, safety, earthquakes, problem solving, electricity, heat, solutions, mechanics, quantum mechanics, flame tests, and molecular structure. (CW)

Presented is a teaching progression that enhances learning through low-cost, manipulative transparencies. Discussed is instruction about restriction enzymes, plasmids, cutting plasmids, plasmid maps, recording data, and mapping restriction sites. Mapping wheels for student use is included. (CW)

Described is Creative Problem Solving (CPS), a model which may be employed to help integrate higher-order thinking skills into elementary science instruction. An example of the use of this model is presented. (CW)

Explained is the effect produced by an optics toy which uses two concave mirrors to produce an illusion. Formulas and calculations used in the explanation are detailed. (CW)

Presents a classroom activity where students vote on topics of interest and then discuss the top ideas through the use of science roundtable discussions. (PR)

Presents a laboratory activity for use during the first or second week of school that engages students in the basic principles of the scientific method. (PR)

Explains how Darwin's observations and experiments can be used to show the true nature of science and good scientific methods. (PR)

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

Presents activities and learning outcomes that came from a project studying the agricultural and architectural technologies of the Hupobi Pueblo who lived in New Mexico some 500 years ago. A large poster with the activities is presented. (PR)

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

Describes the new public television series called "The Secret of Life," and explains how the program can be used in an elementary school classroom. Large color poster is included. (PR)

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…