Voluntary Interdistrict Choice Program: Examining Black Girls’ Experiences at a Predominately White School

The Urban Review - A plethora of research on voluntary school choice programs and the impact on student’s outcomes have been documented. However, lacking are the experiences of students of...     

Developing conceptual understanding in ray optics via learning with multiple representations

A particular difficulty in physics learning is the fact that pupils’ “intuitive” concepts are often resistant to instruction. This article reports empirical results from two related studies within an interdisciplinary project of physics education and educational psychology in ray optics. Two different kinds of treatment groups (TG A and TG B), both targeted at widespread pupils’ intuitive concepts (N?=?511), were compared with the results of a control group (CG C) learning with conventional tasks (N?=?218) provided by a related study II. Pupils in TG A) of study I worked on cognitively activating tasks related to widespread intuitive concepts in ray optics explicitly requiring them to deal with multiple representations. Pupils in the TG B) of study I worked on the same intuitive concepts, but without the cognitively activating representational component. TG A) and B) were compared with each other and with CG C) learning with conventional tasks. The results indicated that tasks addressing widespread intuitive pupils’ concepts improved conceptual understanding significantly more than conventional tasks. There was evidence of a significant intermediate effect showing medium-term stability.     

Mathematics education and learning disabilities in Spain

In the first part of this article, we describe the basic objectives of the math curriculum in Spain as well as the basic contents, teacher resources, and obstacles perceived in mathematics instruction. Second, we briefly describe the concept of learning disabilities (LD) as they are currently defined in Spain. As stated in the recent educational reform, a student with LD is any student with special educational needs. The emphasis is placed on the educational resources that these students need in order to achieve the curricular objectives that correspond to their age group or grade. Third, we comment specifically on the educational services model and the evaluation and instructional procedures for students with math learning disabilities. Finally, we describe some lines of research that have appeared in the last few years in Spain that have led to the development of new evaluation and intervention procedures for students with LD in computation and problem solving.     

Software and Scanner: A Comparison of Procedures in University of California,San Diego's Interlibrary Loan and Course Reserves Units

The Document Delivery Services/Interlibrary Loan Unit and the Course Reserves Unit at the University of California, San Diego's Access Services Department both utilize the Konica Minolta PS7000 book scanner to deliver requested documents and post electronic reserve items. Though the hardware is the same in both units, unique service goals and software—Ariel Interlibrary Loan Document Transmission Software for DDS/ILL and Adobe Photoshop for Course Reserves—result in different issues and challenges. This article discusses the shared practices of the Document Delivery Services/Interlibrary Loan and Course Reserves Units and how each unit utilizes the Konica Minolta PS7000 book scanner to offer better service for their patrons.     

No Poor Child Left Unrecruited: How NCLB Codifies and Perpetuates Urban School Militarism

A critical theoretical framework is used to analyze the No Child Left Behind (NCLB) federal legislation and its role in codifying and perpetuating educational practices and policies that contribute to growing campus militarism in urban schools serving low-income African American and Latino students. The author argues that NCLB § 9528 is part of a broader strategy by the Pentagon to recruit low-income urban youth for the military. The article examines how NCLB's focus on standardized tests and punitive sanctions reinforces urban schools' already narrow curriculum, leading to the diminished capacity of students to question militarism and challenge social oppression.     

Web and social media usage by museums: Online value creation

This paper contributes to the understanding of online strategies in the context of museums as examples of cultural organisations, an underrepresented sector in the information management literature. It presents a theoretical framework for understanding the online strategies of museums’ use of Web and social media, their sources of online value (efficiency, novelty, lock-in, complementarities) and some measurements of Internet performance, such as the Alexa Internet ranking and the number of followers of museums in social media. This type of analysis has not been conducted before and the findings will help museum curators and managers of other cultural institutions to appreciate the impact of these technologies and to make better informed decisions regarding online strategies and resource allocation. In addition, the results of this research are applicable to similar organisations, such as archives and cultural exhibitions, as well as to other service organisations related to information, education and entertainment activities.     

Intermittent hypoxia exposure in a hypobaric chamber and erythropoietin abuse interpretation

Abstract

The aim of this study was to assess the effect of intermittent hypoxia exposure on direct and indirect methods used to evaluate recombinant human erythropoietin (rhEPO) misuse. Sixteen male triathletes were randomly assigned to either the intermittent hypoxia exposure group (experimental group) or the control normoxic group (control group). The members of the experimental group were exposed to simulated altitude (from 4000 to 5500 m) in a hypobaric chamber for 3 h per day, 5 days a week, for 4 weeks. Blood and urine samples were collected before and after the first and the final exposures, and again 2 weeks after the final exposure. While serum EPO significantly increased after the first [from a mean 8.3 IU · l^?1 (s = 3.2) to 16.6 IU · l^?1 (s = 4.7)] and final exposures [from 4.6 IU · l^?1 (s = 1.4) to 24.8 IU · l^?1 (s = 9.3)], haemoglobin, percentage of reticulocytes, and soluble transferrin receptor were not elevated. Second-generation ON/OFF models (indirect rhEPO misuse detection) were insensitive to intermittent hypoxia exposure. The distribution of the urinary EPO isoelectric profiles (direct rhEPO misuse detection) was altered after intermittent hypoxia exposure with a slight shift towards more basic isoforms. However, those shifts never resulted in misinterpretation of results. The intermittent hypoxia exposure protocol studied did not produce any false-positive result for indirect or direct detection of rhEPO misuse in spite of the changes in EPO serum concentrations and urinary EPO isoelectric profiles, respectively.     

In and of the City: Theory of Action and the NYU Partnership School Program

This article explores the theory of action underlying New York University's (NYU's) Partnership Schools Program—explaining in the process what a theory of action is, and how it can be constructed for other innovations in other contexts. NYU's Partnership Program involves 23 schools, K-12, spanning several of New York City's most economically disadvantaged neighborhoods. It operates on the basis of what the authors call “mutual self-interest” and exploits what they call “complementarity.” The authors illuminate the program's original as well as its evolving intentions, and the environmental conditions necessary to enact them and to sustain the program over a decade. They also describe the program's core design elements, with a view to how these may be replicated elsewhere. Finally, they look closely at the Partnership's theory of action in action, employing action research data to portray a meeting where professors and teachers discuss the teacher education residency experiment they have collaboratively launched.     

La construcción individual del sistema de numeración convencional

Resumen

El sistema de numeración posicional de base 10 constituye un objeto cultural, resultado de un largo y dificultoso desarrollo histórico, que se convierte en un objeto de conocimiento a asimilar por el niño. En este artículo se estudia el proceso de reconstrucción individual de este instrumento intelectual, a través de las producciones gráficas espontáneas de 100 niños de edades comprendidas entre los 6 y 10 años, obtenidas en situación de invención de sistemas de notación de cantidades. Las producciones de los niños, cuyas estrategias recuerdan en muchos casos a las empleadas en los sistemas de numeración históricos, describen una génesis. Esta se extiende desde producciones que no contemplan la estabilidad de los grafismos ni la posibilidad de combinarlos, hasta las que recurren al principio del valor posicional, pasando por producciones de tipo aditivo y producciones que intentan, sin conseguirlo, la transposición del sistema de numeración convencional.