This report includes three experiment sections. The first experiment tested sensitivity to loss in altitude and demonstrated that: (1) preview effects led to adaptation; (2) sensitivity decreased with higher flow rates; and (3) sensitivity increased with higher optical texture densities and fractional loss. The second and third experiments…

This report presents the methodology and findings of a national survey of the performance of approximately 9,000 11-year-old children in science. Performance was assessed in six categories: (1) symbolic representation (reading information from graphs, tables, and charts); (2) use of apparatus and measuring instruments; (3) observation; (4)…

The performance of two groups of adult students on the General Educational Development (GED) test was compared to determine whether there was a relationship between the level of student performance on a timed versus non-timed GED test. Each group consisted of the first three hundred students who took the test at twenty-six different testing…

School management activities can be improved by the more complete and systematic use of information on the concrete situation. Teacher judgments constitute an underutilized source of such information, e. g., concerning the distribution of student achievement levels. In this study, the application of formal techniques from management science…

In evaluating whether the laboratory guides for Project Physics and for PSSC are consistent with the goals of their designers in demonstrating the interplay between experiment and theory in the development of physics, a system was developed for analyzing physics laboratory investigations, and the laboratory activities in the "PSSC Physics…

This document discusses the relation between adolescents' expertise (their informational background, which can be accurate or inaccurate, about a particular task or subject) and their formal operational reasoning, and reports the results of three studies of the effects of children's expertise on reasoning. In Study I, adolescents from a rural…

This study examines the methodologies and costs of establishing educational delivery systems using satellites currently in orbit or planned. It identifies two operational system scenarios and their predicted costs. One system, the Canadian Universities Satellite System (CUSS), is hypothesized to provide the means of transmitting audio and video…

Seven mastery instruction courses offered in different quarters at the University of Washington are examined. The study method involved obtaining student ratings of these courses for comparison among themselves and with student ratings of traditional lecture method courses in the same subject field. For this purpose a Mastery Instruction Student…

An integrated learning strategy program emphasizing a connection technique employing questions and answers was developed and tested. Components were derived from a review of educational and psychological literature and from an analysis of responses to a learning-strategy inventory. Visual imagery and paraphrasing connection also were evaluated.…

The technique originating from the study of ecological systems for the examination of dynamic educational systems over time is utilized. The technique is based on the theory of energy exchanges in interactions between variables. Using this technique, interactions among variables can be specified and simulated over time using an analog computer.…

After the Westinghouse Electric Corporation made a comprehensive analysis of the technical, economic, social, environmental, and institutional factors affecting the feasibility of utilizing solar energy for heating and cooling buildings, it determined that solar heating and cooling systems can become competitive in most regions of the country in…

Part 1 of this report outlines the concept of vouchers and the nature and objectives of the New Rochelle study. The more pertinent work tasks undertaken to accomplish the objectives are contained in the appendix. The authors describe their position regarding the voucher plan, highlight its major elements, and outline the steps the district should…

Reports on a study which investigated the effects of having students analyze circuits in the laboratory compared with troubleshooting from homework problems. Results indicated that laboratory experiences provide a richer learning experience than lecture and homework alone. (TW)

Describes three experiments measuring changes in children's social speech which used the presence or absence of partitions allowing partial visual contact to alter verbal communication contingencies between players. Altered levels of speech and specificity confirm importance of physical environmental factors in regulation of children's play. (MBR)

Japanese lesson study, in various adapted forms, is becoming increasingly significant in professional development of mathematics teachers in the USA. Our goal in the research reported in this paper was to investigate, in a three-tiered teaching experiment, the cycles of learning of two researchers, six teachers, and the students in three grade 4…