Investigated the efficacy of an instructional program designed to induce students to construct a mental scheme in which experimental design and natural experiments are understood as facets of the same problems and which incorporates a general solution procedure applicable to both. Results show a highly significant posttest achievement by the…

Plant tissue culture has developed into a valid botanical discipline and is considered a key area of biotechnology, but it has not been a key component of the science curriculum because of the expensive and technical nature of research in this area. This manual presents a number of activities that are relatively easy to prepare and perform. The…

Thinkback is a new instructional process that uses "thinking aloud" strategies developed by Arthur Whimbey and derives its name from the technology of instant video playback. Thinkback is a generalization of techniques described in the program "Problem Solving and Comprehension," which has been used for more than 20 years. The…

Explains cognitive basis for change in science paradigms using Watson-Crick DNA model to illustrate concepts of "normal" versus "revolutionary" science. Examines these concepts in light of teacher preception of science, and discusses implications for the practice of science education. (JM)

Study aids have been developed in a format allowing students to assimilate partial answers slowly, without consulting the whole answer. Discusses rationale and advantages of using the aids and provides three examples demonstrating logical thinking required to solve short-answer problem and use in multistep mechanistic or synthetic problems.…

Presents a discussion of the need to present a realistic view of the process of science to students in the laboratory. Several activities and readings are suggested. (SA)

Data on 140 eighth-grade earth science students were analyzed to see if logical thinking, instructional method, and the interaction between those two variables explained a significant portion of variance in achievement. Logical thinking was found to account for more variation in achievement than did treatment, although treatment also affected…

Described is a three-phase model for teaching problem solving to the middle school student. Phases include cue attendance, thinking aloud, and developing diagrams of steps to solutions. Because middle school students are in a transitional period in their cognitive processes, implementation of problem solving skills seems appropriate. (Author/DS)

Discusses the educational establishment and relates its position to the need for introducing controversial issues into elementary and secondary classrooms. The need for reform, beginning with science courses in the university, is suggested. (SA)

Describes an investigation of preservice elementary teachers' ability to improve in proposing scientific problems for their pupils. (SA)

Compares collaborative problem solving by learners sitting side-by-side with computer-mediated learning at a distance. Three aspects are studied: high school students' problem- solving strategies and interpretation of the teaching situation; their use of components of the situation; and the cognitive processes involved in understanding domain…

Notes that laboratory work should be more oriented towards puzzle solving rather than technique or illustration. Offers three organic laboratory puzzles which can be solved by melting point alone. Involves lab work at the 100-200-mg scale but still uses conventional glassware. (MVL)

Presents an integrated math/science activity that shows students the differences among the three types of volcanoes using observation, classification, graphing, sorting, problem solving, measurement, averages, pattern relationships, calculators, computers, and research skills. Includes reproducible student worksheet. Lists 13 teacher resources.…

Presents a lesson using chocolate chip cookies to involve children in scientific investigation and mathematical reasoning. (Author/MKR)

Describes the construction of durable, inexpensive and large sand-hourglasses for use in controlled experiments that allow students to observe, infer, measure, record data, and predict. This hands-on activity is designed to take place over a three-day interval. Includes materials needed, techniques, procedures, follow-up activities, and resource…