Are practical activities and ICTs important？ Thoughts and practice of a physics teacher

The influence of teachers＇ beliefs in curriculum implementation has been explored in a number of contexts. With the aim of describing curricular beliefs about practical activities in laboratory and 1CT （information and communication technology） resources, and the relationship between thinking and practice, the author has carried out the case study of a physics teacher, both in his classroom activities and those in laboratory. The sources of information include field notes, questionnaire, interviews, planning and class observation. The results indicate that, what teachers believe is not the same as what they do, appearing more constructive in thinking and more traditional in practice. For example, they believe that ICT must be used to teach science, however, in practice, the most utilized resource is the textbook. The author considers that, taking into account this kind of incoherence is essential in order to reflect about teachers＇ knowledge of sciences, practices and the relationship between these.     

School improvement trajectories: an empirical typology

This paper is based on a multiple case study of schools which have been identified as improving their performance for about a decade. We proposed different criteria by which to characterize and study these improvement processes and, by applying them to our sample, we elaborated a typology of school improvement trajectories: we identified 4 different trajectories of school improvement. We called the first type restricted improvement because at its center is the management of processes that mainly target academic achievement tests; the second is incipient improvement, which is based on changes that restructure the school processes; the third identified trajectory are cases where school improvement is moving toward institutionalization, while the last are those cases where improvement has been already institutionalized and the schools have achieved high levels of educational effectiveness. We identified challenges that schools face at different stages of school improvement and discussed some related policy issues.     

African American students’ college choice processes in a post 209 era

Abstract

High-achieving African American students in California are not attending University of California (UC) campuses. Due to hyper-implementations of Proposition 209, which limited UC campuses’ ability to use race as a significant admission criteria, the UC system and individual UC campus policies have scaled back their efforts to recruit high-achieving African American students from California. This article presents findings from the qualitative portion (n?=?74) of a convergent mixed-method study of over 700 African American college-going students. Findings convey the critical role that access, outreach, diversity, and climate plays in the college choice process of African American high achievers. Drawing upon higher education and critical race literature, the findings further reveal the challenges and opportunities for states and elite universities in retaining its brightest students from diverse backgrounds. This research also conveys the potential of research to inform state, systemic, and institutional policies to increase access to selective public universities.     

ANCHORING ADHD SYMPTOMS TO MENTAL AGE

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM‐5), requires that symptoms of ADHD must be developmentally inappropriate in order for an ADHD diagnosis to be considered. Because the DSM‐5 does not specifically outline procedure for determining developmental inappropriateness of behaviors, practitioners do not have guidance for making this consideration. To explore the relationship between mental age and behavior ratings of ADHD symptoms, the cognitive and behavioral data from 50 children who were evaluated in a school or clinic were compiled for this study. Cognitive ability scores were used to calculate mental age and behavior rating scores were then recalculated using the assessed mental age. Using the recalculated behavior ratings, scores based on mental age decreased significantly on the Attention Problems, Hyperactivity, and Atypicality scales of the BASC‐2. Additionally, as the discrepancy between mental and chronological age increased, larger differences in scores were found.     

The relationships of dissociation and affective family environment with the intergenerational cycle of child abuse

OBJECTIVE: The purpose was to test a model that may explain how physically abused children become physically abusive parents. It was predicted that when the family's affective environment is uncohesive, unexpressive, and conflictual, a history of abuse experiences would be associated with elevated dissociation. It was hypothesized that dissociation would mediate between a childhood history of abuse and the current potential to be physically abusive. METHOD: Abuse history, affective environment in the family-of-origin, dissociation, and abuse potential were assessed in a sample of 76 mothers with elementary school-age children. RESULTS: Predictions were supported. Affective Family Environment moderated the relation between abuse history and dissociation, with abuse history relating to greater dissociation primarily when the family environment was conflictual, uncohesive and unexpressive. Further, dissociation significantly mediated the relation between abuse history and abuse potential (Z = 2.19, p < .05). CONCLUSIONS: Dissociation's strong association with abuse potential may partially explain why only some abused children later perpetuate the cycle of abuse, as those who are not dissociative into adulthood are likely to have lower abuse potential, in contrast to those displaying elevated dissociation. The extent of the dissociation may depend on the affective family environment in which the abuse took place.     

Sweat lactate response during cycling at 30°C and 18°C WBGT

Sweat lactate reflects eccrine gland metabolism. However, the metabolic tendencies of eccrine glands in a hot versus thermoneutral environment are not well understood. Sixteen male volunteers completed a maximal cycling trial and two 60-min cycling trials [30°C?=?30±1°C and 18°C?=?18±1°C wet bulb globe temperature (WBGT)]. The participants were requested to maintain a cadence of 60 rev?·?min^?1 with the intensity individualized at ～ 90% of the ventilatory threshold. Sweat samples at 10, 20, 30, 40, 50 and 60?min were analysed for lactate concentration. Sweat rate at 30°C (1380±325?ml?·?h^?1) was significantly greater (P<0.05) than at 18°C (632±311?ml?·?h^?1). Sweat lactate concentration was significantly greater (P<0.05) at each time point during the 18°C trial, with values between trials tending to converge across time. During the 30°C trial, both heart rate (20, 30, 40, 50 and 60?min) and rectal temperature (30, 40, 50 and 60?min) were significantly higher than in the 18°C trial. Higher sweat lactate concentrations coupled with lower sweat rates may indicate a greater relative contribution of oxygen-independent metabolism within eccrine glands during exercise at 18°C. Decreases in sweat lactate concentration across time suggest either greater dilution due to greater sweat volume or increased reliance on aerobic metabolism within eccrine glands. The convergence of lactate concentrations between trials may indicate that time-dependent modifications in sweat gland metabolism occur at different rates contingent partially on environmental conditions.     

Nature and profiles of racial prejudice: analyses and educational implications in Secondary School students / Naturaleza y perfiles del prejuicio racial: análisis e implicaciones educativas en alumnos de Educación Secundaria

Abstract

The reduction of racial prejudice is an important challenge of intercultural education. Thus, the aim of this study was to analyze racial prejudice, as well as the different profiles and the possible educational implications in secondary school students. A total of 327 third form students completed the scales of blatant and subtle prejudice and also a scale of emotions towards North Africans. The results showed significant levels of subtle prejudice and four profiles of racial prejudice, with a low number of students showing equalitarian tendencies. A multivariate analysis showed significant differences in prejudice depending on social distance as well as the academic level of the participants’ families. Finally, we discuss the results from the perspective of intercultural education and we suggest some lines of intervention in order to promote the integration of students from different cultures.     

The problem of the particular and its relation to the general in mathematics education

Research in the didactics of mathematics has shown the importance of the problem of the particular and its relation to the general in teaching and learning mathematics as well as the complexity of factors related to them. In particular, one of the central open questions is the nature and diversity of objects that carry out the role of particular or general and the diversity of paths that lead from the particular to the general. The objective of this article is to show how the notion of semiotic function and mathematics ontology, elaborated by the onto-semiotic approach to mathematics knowledge, enables us to face such a problem. This paper has been elaborated in the frame of the project I+D: MEC-FEDER: SEJ2004-06637/EDUC