On computing a buy/copy policy using the Pitt-Kraft model

The Pitt-Kraft model of buying versus photocopying results in a small, but complex, nonlinear program. This paper identifies a Kuhn-Tucker point and demonstrates that for certain parameter values it is not optimal. A policy generation procedure is presented; the purpose is to prevent convergence of a primal algorithm to this inferior policy, which satisfies the Kuhn-Tucker optimality conditions.     

Universal Interventions: Fully Exploring Their Impacts and Potential to Produce Population-Level Impacts

In this article we seek to promote a deeper understanding of the value of universal intervention research in education as well as other fields and to call for greater interdisciplinary learning and discourse. Our goal is to deepen the conversation regarding how to build a stronger research orientation toward longitudinal, population-level outcomes in education and mental health. After highlighting the value of universal approaches targeting entire populations and their relevance to education, we raise issues regarding the traditional benchmarks of efficacy when applied to universal intervention trials and suggest alternative metrics for judging the impact of universal approaches. We conclude with lessons based on exemplar studies to help shape future research and policy regarding universal interventions.     

Recasts Used with Preschoolers Learning English as their Second Language

This study examined linguistic recasts provided by 16 early childhood educators to preschool children learning English as a second language (EL2). Recasts are semantic and syntactic revisions of children’s utterances. The educator–child interactions were filmed during book reading and play dough activities with small groups of four children, one of whom was EL2. The EL2 children were rated by their educators as having less well-developed expressive language skills than their unilingual peers. However, despite this finding, educators provided similar rates of recasts to both groups of children. Eight EL2 children with the lowest expressive language skills demonstrated fewer uptakes of their educator’s recasts in comparison to EL2 children with higher expressive language skills. The implications of this study include increasing the rate of recasts and reducing their complexity to provide language-learning opportunities for all preschool children, especially for those learning English as a second language.     

Research Experience as a Component of Science and Mathematics Teacher Preparation

Journal of Science Teacher Education -     

Teaching high school science using image processing: A case study of implementation of computer technology

An in-depth case study of teachers' use of image processing (a state-of-the-art computer technology used by research scientists) in biology, earth science, and physics classes within one high school science department explored issues surrounding technology implementation. The study, conducted within a districtwide, schoolwide, and classroom context, explored four areas related to the teacher's adoption of image processing: (a) teachers' background with computers outside of instructional use, (b) teachers' attitudes toward educational technology and insights gained from their experience using computers within the science curriculum, (c) training and perceived influence of district and school administrators, and (d) teachers' classroom and computer lab practices. The following factors were deemed critical in teachers' decision to use or not use image processing with their students: (a) time to thoroughly explore and master the technology so they could use it with students to explore science concepts; (b) classroom management skills specific to technology use; (c) perception of the teaching value of the technology; (d) perception of the reasonableness of administrators' expectations for technology use; and (e) understanding of how to implement inquiry-based science teaching, independent of technology issues. These factors have implications for how to help teachers use computer technology to teach high school science. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 297–327, 1998.     

The Health of the Story

ABSTRACT

A meditation from a storytelling teacher on my attempts to construct rules and guidelines for my work. This semi-narrative internal dialogue attempts to explore both the ways in which my identity shapes a learning environment and the ways I can create structures in my teaching practice that undermine the structural imbalance of our society.     

1. CBQ REVIEW ESSAY: Cyborg Discourse: Technology's Transformation of Communication

Ralph Lee Smith's The Wired Nation: The Electronic Communications Highway (New York: Harper Colophone Books, 1972---$1.95, paper)

Jerrold Oppenheim's Soapbox Television: Introduction to Model Code of Regulations Cable Television-Broad, and Communications (Chicago: ACLU, South Clark, First Revision of November 1971-- 2.00, paper)

Robert K. Yin, Cable on the Public's Mind

Rolla Edward Park, Computer Code for a Cable Television System Financial Model

Rolla Edward Park, The exclusivity Provisions of the Federal Communications Commission's Cable Television Regulations

S.M. Genensky, et. al. Advances in Closed Circuit TV Systems for the Partially Sighted

Broadband Communications Report (Broadband Information Services Inc. 274 Madison Ave., New York 10016)

The Videocassette &; CATV Newsletter (Martin Roberts &; Associates, Inc., Box 5128N, Beverly Hills, Calif. 90210)     

Some aspects of broadcast news coverage and riot participation

It has often been said that the commercial rating services are “the only game in town.” Thus far, the academic researchers usually have left it up to the operators of the “game” to test and refine their methods. The following article is one of the exceptions: an interesting methodological study of how people respond when queried in different ways about their viewing. Dr. Green‐berg is associate professor of communication at Michigan State University; Miss Dervin and Mr. Dominick are graduate students in the same department.