Stability of switching linear systems with switching signals driven by stochastic processes

This paper presents conditions to assure the exponential stability in probability for autonomous switching linear systems. The switching signal acting on the autonomous system produces intervals that follow independent, identically distributed stochastic processes—the stability then follows by verifying simple-to-check linear matrix inequalities.     

Measures of Information Seeking: A Validation Study in the Context of Nonmedical Drug Use Behaviors

Health information is readily available and easily obtained from a variety of media and interpersonal sources. Although several studies have examined health-related information seeking, a comprehensive validation study of this measure is still needed. This study uses a longitudinal cohort study of Israeli university students (N = 800) aged 18–30, and a cross-sectional sample of U.S. college students (N = 498) to validate measures of information seeking about the nonmedical use of two drugs (marijuana and amphetamines) from a range of media and interpersonal sources. Information seeking measures for both drug types showed good convergent, discriminant, nomological, and test-retest validity. Results offer support for the use of these measures as valid indicators of the constructs for which they were designed. Implications for the use of these measures in future research are discussed.     

The Sensitivity of Value-Added Teacher Effect Estimates to Different Mathematics Achievement Measures

Using longitudinal data from a cohort of middle school students from a large school district, we estimate separate "value-added" teacher effects for two subscales of a mathematics assessment under a variety of statistical models varying in form and degree of control for student background characteristics. We find that the variation in estimated effects resulting from the different mathematics achievement measures is large relative to variation resulting from choices about model specification, and that the variation within teachers across achievement measures is larger than the variation across teachers. These results suggest that conclusions about individual teachers' performance based on value-added models can be sensitive to the ways in which student achievement is measured.     

Supporting Two Households: Unaccompanied Mexican Minors and Their Absences From U.S. Schools

This article illustrates simultaneous household participation in the lives of undocumented, unaccompanied Mexican teenage minors in New York City and its impact on their school attendance. Emigrating without parents, some Mexican youths arrive to enter into the labor market, not school. Unable to assume monetary dependence, these youths’ absences from New York classrooms is driven by financial participation in their natal households in Mexico and current New York City households. Drawing from fifty-three interviews with Mexican teenagers in Mexico and New York City, this article explores how these youth laborers learn to, understand and fulfill monetary obligations to two households.     

The educator's point of view

The educator's point of view stresses the development potential of education, together with respect for human rights. It is seen that nations need to make clear policy statements in this respect, and the consequent planning and curricular issues, together with some relevant strategies, are indicated.

---

Zusammenfassung Im Standpunkt des Pädagogen wird gemeinsam mit der Anerkennung der Menschenrechte das Entwicklungspotential der Bildung betont. Nach Meinung des Autors müssen Nationen in diesem Zusammenhang klare politische Aussagen treffen, und der Artikel befaßt sich mit der entsprechenden Planung sowie Themen zum Curriculum und einigen relevanten Strategien.

---

Résumé Le point de vue de l'éducateur souligne le potentiel de développement offert par l'éducation, ainsi que le respect des droits humains. Il s'avère que chaque nation doit énoncer clairement sa politique à cet égard; l'auteur indique les questions de planification et de curriculum qui en découlent, ainsi que quelques stratégies pertinentes.

     

Co-occurring forms of child maltreatment and adult adjustment reported by Latina college students

OBJECTIVES: This study had two primary objectives: First, to examine the nature and co-occurrence of various forms of child maltreatment (sexual, physical, emotional, and witnessing violence) reported by Latina college students, and second, to explore coexisting maltreatment types and acculturation status as possible contributors to long-term adjustment difficulties. METHOD: Participants were 112 Latina undergraduate students categorized by the number of childhood maltreatment types experienced (0, 1, or 2 or more) and acculturation level (1 to 5). The possible effects of co-occurring forms of maltreatment, in conjunction with acculturation status, were investigated with respect to participants' reported trauma symptomatology. Data were collected using self-report measures. RESULTS: Nearly three out of 10 participants (29%) experienced more than one type of child maltreatment and, as expected, these individuals reported greater trauma symptomatology than those reporting either a single type of maltreatment or no maltreatment at all. Those who reported multiple types also endured more severe maltreatment than did respondents who experienced a single type. Acculturation level was neither directly related to trauma symptoms nor did it moderate the lasting correlates of maltreatment among victims. Interestingly, those who experienced a single form of maltreatment reported no more trauma symptoms than did participants who reported no maltreatment history at all. CONCLUSION: This investigation documents a large degree of overlap among various forms of self-reported childhood maltreatment within a Latina college population. The results underscore the need to consider multiple forms of maltreatment, as well as severity, when making inferences regarding potential effects on later functioning.     

TEACHER BEHAVIORAL PRACTICES: RELATIONS TO STUDENT RISK BEHAVIORS,LEARNING BARRIERS,AND SCHOOL CLIMATE

Student behavioral problems pose a myriad of challenges for schools. In this study, we examine the relations among teacher and school‐level constructs (i.e., teacher collaboration, supervision/discipline, instructional management), and student‐related outcomes (i.e., high‐risk behaviors, barriers to learning, student social–behavioral climate). Teachers across 29 high schools, in a large urban school district serving primarily low‐income students, completed self‐report surveys. Multilevel regression was used to test both individual‐ and school‐level predictors of student outcomes. Findings suggest that teacher practices at the individual and school levels are linked to student high‐risk behaviors, barriers to student learning, and school climate. More specifically, findings indicate that better supervision/discipline and instructional management are associated with fewer high‐risk behaviors and barriers to learning. More instructional management is also linked to positive social–behavioral climate. Results from this study highlight the association between teacher practices and a range of student‐related problem behaviors, and suggest that system‐level interventions in the school may have positive effects.     

Latinx students’ experiences with college access and preparation at college preparatory charter schools

Charter schools that target underserved communities, including Latinxs, have proliferated in the U.S., claiming a unique, more autonomous and successful alternative to traditional public schools, often with a promise of increased postsecondary access and preparation. However, there is conflicting evidence regarding their effectiveness on academic outcomes, prompting additional research on charter schools. This study examined the college access and preparation experiences of 14 Latinxs attending college preparatory charter schools within one school system in Texas. Findings highlight how schools assisted students in preparing for college, but challenges in accessing college knowledge and assistance still existed, particularly for undocumented students.     

Preservice Teachers Adrift on a Sea of Knowledges

The paper argues for fresh recognition of the complexities faced by preservice teachers, particularly during the practicum, where they are expected to bring their stockpile of diverse, and sometimes conflicting, knowledges about effective teaching to immediate use with classroom learners. The paper abo draws on insights from postmodern theorising on the privileging of knowledges. While the major focus of the paper is on issues surrounding multiplicity of knowledges about effective classroom teaching, it is also recognised that much of learning to teach occurs in affective, ethical and interpersonal ways as well as cognitive. Several suggestions are made to assist preservice teachers negotiate the complexities of the process of becoming teachers. It is argued that the practicum in preservice teacher education can be seen as a rich site for further exploration of this process—and should be resourced commensurately. Such explorations have the potential to illuminate the ways in which preservice teachers mesh knowledges about effective teaching with their own personal values and beliefs within the specific contexts of their classrooms. Associated with the recognition of the complexities of the processes involved, is a call for university and school based teacher educators to model, with respect to their programmes and practices, the same level of critical reflection they advocate for student teachers.     

Dignifying the educational process through conscientização

Teaching is a very complex endeavor. Embedded within this complex environment are issues of power, culture, ethnicity, and race. When teachers and students come together, in the classroom, some of these issues become visible and others remain invisible. Attempting to make influences on teaching and learning visible is one of the steps toward developing a practice framed by conscientização. Ms. Cook, the teacher of this story, is empowering herself and her students; through critical reflection that serves to deneutralize educational acts by recognizing they are embedded in issues of culture, ethnicity, politics, power, and, race. Classroom based research must be more inclusive and indeed cognizant of the mediating macrostructures that teachers deal with everyday. For example, Goldberg and Muir Welsh describe some of the students as being Latinos. In doing so, they adopts a third person as opposed to a first person view of these students. A first person view can acknowledge a dialectical relationship between race and ethnicity.