Knowledge about the structure of arithmetic expressions enables people to reason effectively about such expressions, including an ability to judge equivalence under transformations. This paper reports an empirical study of six middle-school children who judged the equivalence of three sets of three-term arithmetic expressions with an addition and…

Most school curricula include the study of health as a separate subject or as part of science. Despite this, students often leave school without a clear understanding of many health concepts. This study investigated a group of grade eight and nine students' knowledge of personal health and physical fitness concepts and its relation to locus of…

Reports on student attitudes toward science-technology-society (STS) after visiting a science-technology museum and considers what variable factors of the visitation impacted these attitudes. Results indicated that significant differences in attitudes were present between visiting and nonvisiting students and between grade levels. (TW)

Mathematical problem-solving processes used by 27 eighth graders who had studied programming were compared to those of 27 who had not. Programmers used more systematic approaches and reviewed solutions more often than nonprogrammers but did not make more use of equations or do more planning. (PK)

This field study examined learning effects attributable to instructional design characteristics when eighth-grade science students used a print encyclopedia or a videotex version of the encyclopedia to write term papers. Results suggest that specific effects of instructional design characteristics of a delivery system are of a limited nature. (MBR)

Explores, in a reprint of the 1989 Junior Division National History Day winning paper, the history of some technological developments in Pennsylvania's coal mining industry. Examines the "breaker boys," youths who sorted coal in severe working conditions. Introduces Ellen Webster Palmer, who addressed the problem by organizing the Boys'…

This paper illustrates the use of rule space as a tool to support cognitive analyses of students' mathematical behavior. The rule space approach is explained and is then used to classify students into one of two methods for solving linear algebraic equations in one unknown and to diagnose their knowledge states in this topic. A 32-item test with…

In this research, 103 Hispanic junior high school students were instructed using the Kumon Mathematical Method. Instruction took place 1 hour per day, 5 days a week in a public school setting. Instruction extended over an eight month period. Student subjects were pretested and posttested on the Mathematics batteries of the California Achievement…

This study combines quantitative and ethnographic methods to analyze middle-school students' uses and understandings of microcomputers and videotex. As an experiment in teaching library research skills, 27 eighth graders were assigned to search an online encyclopedia in preparation for writing a science theme. The students' operational practices…

Reports on a study of eighth-grade mathematical performance of 77,000 students in 19 countries, data from 1964 and 1982 studies in 9 countries, and data on gender stratification and its impact on mathematics performance. Finds that a cross-national variation exists and that it is related to gender stratification. (CFR)

Reports on a study of the impact of attending restructured schools on the achievement and engagement of 8,845 eighth graders from public, Catholic, and independent schools. Finds modest, but consistently positive, effects on both achievement and engagement. Also finds that students attending smaller schools demonstrated more academic achievement.…

Designed to provide trend data about critical transitions experienced by students as they leave elementary or middle school and progress through high school and beyond, this study examines the extent of traumatic events experienced by 10th graders of various ethnic backgrounds and family types. In addition, the study demonstrates the importance of…

This study is part of an on-going research project to assess differences in educational attainment when controlling for race, sex, and socioeconomic status. The National Educational Longitudinal Survey (NELS) 1988 of 8th graders and a survey of 10th graders, High School and Beyond 1980-82 (HSB), were utilized to obtain data that were then…

The National Assessment of Educational Progress (NAEP), also known as "The Nation's Report Card," is a congressionally mandated survey of educational achievement of American students in a variety of curriculum areas and of changes in that achievement across time. Part 1 of this report consists of the results of NAEP's 1990 national…

Despite the legal mandate for fulltime school participation between the ages of 6 and 18 and the mandate for high school completion, many youths do not fulfill these expectations and are viewed as dropouts. To investigate the characteristics of seventh and eighth grade students who leave school and the reasons why they do so, school personnel in…