El ordenador como instrumento de la mente

El discurso argumentativo escrito tiene intrínsecamente un carácter dialàgico. Esta característica se pone de manifiesto en la contraargumentación, uno de los aspectos que mayor dificultad presenta para los aprendices, tanto en la comprensión como en la producción de textos escritos. Esta dificultad se hace patente en las actividades desarrolladas en el curso de una secuencia de enseñanza y aprendizaje sobre este tipo de discurso con alumnos de los primeros niveles de enseñanza secundaria. De ello se desprende la necesidad de su enseñanza específica.     

Measure the Volume of a Tree: A Transformative Modeling Lesson on Measurement for Prospective Middle-school Science Teachers

Measurement is an essential skill that students need to develop in both mathematics and science classes. However, many students only develop very superficial understanding regarding the nature of measurement. Building upon modeling-based work, we construct a framework that views measurement as a complex set of knowledge and skills one can use to transform a model and/or a referent and their variations and bring them together in a coherent way. We use this framework to guide the design and implementation of a unit on measuring the volume of a tree with two cohorts of prospective teachers of middle grades. With selected examples, we illustrate our framework in terms of the relationship between modeling and measurement. We provide insights on how to design activities that enhance students’ in-depth understanding of measurement.     

Conceptual Foundations and Components of a Contextual Intervention to Promote Student Engagement During Early Adolescence: The Supporting Early Adolescent Learning and Social Success (SEALS) Model

Decades of research indicate that many early adolescents are at risk for developing significant school adjustment problems in the academic, behavioral, and social domains during the transition to middle school. The Supporting Early Adolescent Learning and Social Success (SEALS) model has been developed as a professional development and consultation program to train teachers in universal (Tier 1) instructional and classroom management strategies to address the correlated risks experienced by students during this time. This article reviews the conceptual foundations of the SEALS model, provides an overview of SEALS intervention components, describes the SEALS professional development training and consultation framework, reviews preliminary findings of the impact of SEALS in rural school settings in the United States, and discusses research needs and future directions regarding the use of the SEALS model.     

The Knowledge Required for Tutorial Planning: An Empirical Analysis

A significant portion of tutorial interactions revolve around the bugs a student makes. When a tutor performs an intervention to help a student fix a programming bug, the problem of deciding how to help the student appears to require extensive planning. In this article, we identify five considerations tutors appear to take into account when they plan tutorial interventions for students’ bugs. Using data collected from human tutors working in the domain of introductory computer programming, we (1) identify the knowledge tutors use when they reason about the five planning considerations, and (2) show that tutors are consistent in the ways that they use the kinds of knowledge to reason about students’ bugs.     

Learning,Testing, and the Evaluation of Learning Environments in Medicine: Global Performance Assessment in Medical Education

Changes in the profession of medicine are creating the demand for a substantive reexamination of current practices in medical education. Many of the major issues in addressing this challenge are structural and political rather than scientific; here we address one critical scientific issue that will be important to (though not by itself adequate for) guiding such changes. The factor we address is the development of a global performance assessment: a standardized mechanism to assess individual skills and abilities that can be used to evaluate alternative educational interventions. We discuss the issues involved in developing such a system, and describe a set of principles for defining desired outcomes and developing assessment tools, including (a) wide clinical scope, (b) direct relationship to actual clinical performance, (c) reliability and repeatability, and (d) non-longitudinal measurement. We discuss the role of simulation, reflective practice, and portfolios of work in developing such a system, and argue that whatever form such metrics take, a system of global performance assessment will develop from close collaboration between clinicians and educators with innovative ways of thinking about performance and expertise.     

Professional learning during a schools–university partnership Master of Education course: teachers’ perspectives of their learning experiences

An extensive body of research has indicated the benefits of collaborative, contextualised and enquiry-based learning for teachers’ professional development and school improvement. Yet professional learning is also known to be constrained by a number of factors, including the organisational limitations of schools, conflicting cultural practices and wider political demands. Schools–university partnerships have been developed to overcome some of these difficulties by transcending particular school contexts and offering alternative theoretical and practical perspectives. The complex combination of motivations, backgrounds and working contexts in such partnership work calls for attention to the individual and collective learning experiences of those involved, including the ways in which school and university contexts are, or could be, effectively bridged. This paper focuses on understanding the learning experienced by a cohort of teachers and school leaders involved in a two-year schools–university partnership Master of Education (M.Ed.) course in England. A mixed group of 15 experienced primary and secondary teachers and school leaders reflected on their learning at five points of time during and shortly after completing their M.Ed. course. Qualitative analysis of the group’s interview responses and reflective writing led to the identification of six related aspects of personal and professional learning experience: being a learner; learning as part of professional practice; widening repertoire; changing as a learner; personal growth; and critically adaptive practice. The identification and visual representation of these aspects of experience emerging within the group offers useful insight into teachers’ perspectives on learning in school and university contexts and their experiences of progression over time. We conclude that more explicit and central attention to the professional and personal learning elements of schools–university partnerships can help to resolve some of the binary ‘theory–practice’ tensions that have been extensively discussed in relation to partnership programmes and teacher professional development. There is a need to acknowledge variation in teachers’ learning experiences within schools–university partnerships, bearing in mind the ongoing nature of this reflective process with each new group of school and university colleagues. Analysis of participants’ learning experiences in school and university contexts also draws attention to the wider structures, values and cultures that influence, and are influenced by, schools–university partnership work.     

Exercise cardiac power and the risk of heart failure in men: A population-based follow-up study

Background:Little is known about exercise cardiac power(ECP),defined as the ratio of directly measured maximal oxygen uptake with peak systolic blood pressure during exercise,on heart failure(HF)risk.We examined the association of ECP and the risk of HF.Methods:This was a population-based cohort study of 2351 men from eastern Finland.The average time to follow-up was 25 years.Participants participated at baseline in an exercise stress test.A total of 313 cases of HF occurred.Results:Men with low ECP(<9.84 mL/mmHg,the lowest quartile)had a 2.37-fold(95%confidence interval(95%CI):1.68-3.35,p<0.0001)hazards ratio of HF as compared with men with high ECP(>13.92 mL/mmHg,the highest quartile),after adjusting for age.Low ECP was associated with a 1.96-fold risk(95%CI:1.38-2.78,p<0.001)of HF after additional adjustment for conventional risk factors.After further adjustment for left ventricular hypertrophy,the results hardly changed(hazards ratio=1.87,95%CI:1.31-2.66,p<0.001).One SD increase in ECP(3.16 mL/mmHg)was associated with a decreased risk of HF by 28%(95%CI:17%-37%).Conclusion:ECP provides a noninvasive and easily available measure from cardiopulmonary exercise tests in predicting HF.However,ECP did not provide additional value over maximal oxygen uptake.