Lesson Study is rapidly becoming one of the most adopted models of teacher professional development worldwide. In this paper, we examine the teachers' discussions that are an integral part of the Lesson Study research cycle. In particular, we investigate the "dialogic mechanisms" that enable teachers' pedagogical intentions to be…

This paper describes the ideas that mathematics teachers (grades 5-9) have regarding mathematical models of real-world phenomena, and explores how teachers' ideas differ depending on their educational background. Participants were 56 United States in-service mathematics teachers. We analyzed teachers' written responses to three open-ended…

In large-scale surveys, it is no longer uncommon for repeated measurements to be obtained from respondents and analyses performed to gauge the magnitiude of nonsampling errors. This is particularly true for periodic surveys and longitudinal surveys where a very large investment in data collection is made. This technical note, aimed at the analysis…

Examines the effect on earnings of variations among individuals in postschool human investment (namely, in work experience after the completion of schooling). Data from the Johns Hopkins Retrospective Life History Survey are analyzed to make possible a reformulation of Becker and Chiswick's econometric model to allow for additional variations…

Duncan's interpretation of his research on the nature and process of the distribution of rewards in the U.S. stratification system is questioned. Statistical and conceptual flaws are noted in Duncan's work and their implications explored. A reanalysis of primary survey data is presented and, based on a reinterpretation of this data, a…

A STUDY WAS MADE OF THE NATION'S DEFENSE INDUSTRY TO DETERMINE ITS INFORMATION NEEDS AND THE FLOW OF SCIENTIFIC AND TECHNICAL INFORMATION (FLOW PROCESS) NECESSARY TO SATISFY THESE NEEDS. VOLUME I, LI 000 345, OF THE THREE VOLUME FINAL REPORT IS AN OVERVIEW OF THE OTHER TWO VOLUMES AND INCLUDES GUIDELINES FOR MANAGEMENT DECISIONS AND…

IN PHASE II OF THE DEPARTMENT OF DEFENSE (DOD) SURVEY TO FIND OUT HOW SCIENTISTS AND ENGINEERS IN GOVERNMENT AND INDUSTRIAL RESEARCH, DEVELOPMENT, AND PRODUCTION ACTIVITIES ACQUIRE INFORMATION, SCIENTIFIC PERSONNEL IN THE DEFENSE INDUSTRY WERE INTERVIEWED TO DETERMINE THEIR INFORMATION NEEDS AND THE FLOW OF INFORMATION INHERENT IN SATISFYING THESE…