Assessing students' disciplinary and interdisciplinary understanding of global carbon cycling

Global carbon cycling describes the movement of carbon through atmosphere, biosphere, geosphere, and hydrosphere; it lies at the heart of climate change and sustainability. To understand the global carbon cycle, students will require interdisciplinary knowledge. While standards documents in science education have long promoted interdisciplinary understanding, our current science education system is still oriented toward single‐discipline‐based learning. Furthermore, there is limited work on interdisciplinary assessment. This article presents the validated Interdisciplinary Science Assessment of Carbon Cycling (ISACC), and reports empirical results of a study of high school and undergraduate students, including an analysis of the relationship between interdisciplinary items and disciplinary items. Many‐faceted Rasch analysis produced detailed information about the relative difficulty of items and estimates of ability levels of students. One‐way ANCOVA was used to analyze differences among three grade levels: high school, college Freshman–Sophomore, college Junior–Senior, with number of science courses as a covariate. Findings indicated significantly higher levels of interdisciplinary understanding among the Freshman–Sophomore group compared to high school students. There was no statistically significant difference between Freshman–Sophomore group and Junior–Senior group. Items assessing interdisciplinary understanding were more difficult than items assessing disciplinary understanding of global carbon cycling; however, interdisciplinary and disciplinary understanding were strongly correlated. This study highlights the importance of interdisciplinary understanding in learning carbon cycling and discusses its potential impacts on science curriculum and teaching practices.     

Discrimination,Parent–Adolescent Conflict,and Peer Intimacy: Examining Risk and Resilience in Mexican-Origin Youths' Adjustment Trajectories

Peer discrimination and parent–adolescent conflict in early adolescence were examined as predictors of depressive symptoms and risky behaviors from early to late adolescence using four waves of data over an 8-year period from a sample of 246 Mexican-origin adolescents (M_{Time 1 age} = 12.55, SD = 0.58; 51% female). The buffering effect of friendship intimacy and moderating role of adolescent gender were tested. Higher levels of discrimination and conflict in early adolescence were associated with higher initial levels of depressive symptoms and risky behaviors in early adolescence and stability through late adolescence. For females who reported higher than average discrimination, friendship intimacy had a protective effect on their depressive symptoms.     

Activist trust: the diffusion of green expertise in a Brazilian landscape

MST (Movimento Sem Terra/Landless People's Movement) is the largest rural movement of Latin America. Since the late 1990s, it has taken part in the diffusion of expertise about biodiversity conservation. Using an ethnographic approach, this paper investigates sources and roles of trust within this process. How does trust work when experts and laypeople belong to the same movement? The paper uses and critically discusses the works of Brian Wynne and the Actor Network Theory. It describes the particular ways in which the building of trust takes place within the intimate networks of MST. As ecological expertise becomes a central element within MST's project of liberation, the sources of trust are both affective and effective. Interests, social recognition and identity are intertwined. In the conclusion, I propose the concept of activist trust.     

Stone consolidation: The role of treatment procedures

Four types of carbonate stones and three consolidation products were used in a systematic study to assess the influence of the application procedures on the amount of product applied, as a primary step to evaluate consolidation treatments. Microdrilling, ultrasonic velocity and flexural resistance were used as performance indicators. The amount of product of a specific treatment and its action depend on the application procedures, both when the treatments are carried out in the laboratory and on site. The results are expected to contribute to the standardisation of testing protocols on stone consolidation.     

Critical analysis of the effects of the digital technologies on reading and learning / Análisis crítico sobre los efectos de las tecnologías digitales en la lectura y el aprendizaje

Abstract

In the digital age, the introduction of digital technologies (or information and communication technologies, ICT) in classrooms is a necessary, imperative reality. However, the educational results do not seem to match the expectations generated. For this reason, this revision seeks to make up for the scant attention paid to the possible harmful effects of the use of ICT based on research and educational practice. After providing a general overview of the impact of ICT on learning, we survey the results of studies that reveal potential negative consequences of their use inside and outside the school context. We analyse their impact on both academic performance and other more specific areas, such as reading comprehension, and we stress the negative effects on so-called ‘digital natives’. In short, what stands out is the importance of an evidence-based education practice which bears in mind the possible harmful effects of using ICT and bears in mind that its beneficial effects seem to rely on not only how much but also how they are used.     

Scale of attitudes of schoolchildren towards immigrant pupils

In the academic year 2004–2005, approximately 400,000 immigrant pupils were enrolled in Spanish schools and six-form colleges. The racial and ethnic diversity that Spanish society and schools present could be a source of new opportunities and social enrichment, for the national as well as the immigrant population. However, this contact between nationals and immigrants is not free of problems. School is one of the areas where attitudes towards different social groups begin to be formed, while at the same time being the main opportunity that our society has to create an environment of coexistence and attitudinal change. The first step to look at such a complex phenomenon in more detail is to have evaluation tools available that allow us to measure it. In this article we present the results referring to psychometric features, and we carry out a differential analysis of the Scale of attitudes of school-children towards immigrant pupils.