Lead in petrol

There is strong evidence that petrol-derived lead accumulates in the blood. That high doses of lead are very toxic has long been known, but the physical and mental effects of exposure to very low concentrations over a long period are still controversial. All governments are under strong pressure to restrict the permissible level of lead in petrol, but this poses problems for engine designers and entails penalties in oil conservation.     

Helping Students Help Themselves: Strategies for Successful Mentoring Relationships

Mentoring has long been heralded as a method of training and socializing the next generation of professional counselors and counselor educators. Yet, there appears to be a disparity between the promotion and the practice of mentoring in counselor education. The authors attempted to reconcile this disparity by suggesting a set of strategies that mentors and apprentices may use as they establish and maintain successful mentoring relationships. Implications for counselors and counselor educators are discussed.     

Long-Term Relations Between Children’s Language,the Home Literacy Environment,and Socioemotional Development From Ages 3 to 8

Research Findings: This study investigated the long-term interrelations among children’s language competencies, their home literacy environment (HLE), and 3 aspects of socioemotional development from ages 3 to 8, controlling for characteristics of the child and family. For this sample of 547 typically developing German children, parents and teachers reported on cooperative behavior, physical aggression, and emotional self-regulation. Language was assessed using established test instruments. HLE was operationalized by the number of books in the household, the frequency of shared book reading, and an observation during shared book reading. Path analyses supported effects of language and HLE at age 3 on all 3 indicators of socioemotional development over the 5-year period. An additional mediational analysis revealed different patterns of results depending on the aspect of socioemotional competency under study. Although the effect of early language and HLE at age 3 on cooperative and (low) aggressive behavior at age 8 was partially mediated by language at age 5, children’s early language at age 3 was the best predictor of the development of emotional self-regulation. Practice or Policy: Findings identify a rich HLE and proper language skills as protective factors for socioemotional development in not-at-risk children; these factors should be further established in social skills training.     

An actor‐network theory reading of change for children in public care

The education of children in public, or Local Authority (LA), care, known in the United Kingdom (UK) as looked‐after children (LAC), is supported by government initiatives to reduce the attainment gap that exists between LAC and their non‐LAC peers. These children often find remaining in education a challenge, are twice as likely to be permanently excluded, and three times more likely to receive a fixed‐term exclusion than other school‐age children. A high proportion (61%), have been labelled as having special educational needs (SEN) (DfE, 2015a ). In the UK, the Virtual School (VS) has a statutory role in the education of LAC (DfE, 2014a) and aims to encourage more stringent monitoring and intervention for pupils. This is partly achieved through the creation of a personalised education plan (PEP) for each LAC pupil, which outlines progress, strategies intended to accelerate attainment, and resources needed for doing so. The process involves the pupil, their social worker and the designated teacher (responsible for the welfare of LAC pupils) of the school attended. The current study uses Actor‐Network Theory (ANT, e.g. Latour, 1999 ) as a lens through which to conceptualise change for LAC pupils during the PEP process. The focus is upon three PEP meetings in one LA setting, in order to explore the people and things that are active in driving forwards change for LAC, with a view to examining the efficacy of the process and the roles of those involved. The analysis made visible the importance of the role of the designated teacher in the PEP process, in contrast to the relative inactivity of social workers and of pupil voice.     

Homophobia and Heterosexism in Public School Reform: Constructions of Gender and Sexuality in California's Single Gender Academies

This article examines heterosexist assumptions and the role of homophobia in students' experiences in California's public "Single Gender Academies," in an effort to include issues of sexuality in current discourses on adolescent gender identity and public school reform. Interviews with students, conducted as part of the most comprehensive research on public single-sex schooling in the U.S. to date, reveal a critical link between students' notions of sexuality and definitions of masculinity and femininity. Alongside dichotomous, static notions of gender, the ideology and structure of the Single Gender Academies largely promoted heterosexist assumptions of students' sexuality. Such assumptions pervaded school policies and practices as well as peer relations and students' sense of gender identity. Students, in turn, both actively constructed and resisted a theory of gender which framed boys and girls in opposition and promoted heterosexuality as the norm. This article provides an analysis of homophobia among students and the influence of academy assumptions on students' attitudes. Such a focus allows for an investigation of gender and sexuality at both individual and institutional levels. While the research is based on data collected at public single-sex schools, the findings provide insight into students' articulations of gender and sexuality across a variety of school contexts.     

Preparing Biology Graduate Teaching Assistants for Their Roles as Instructors: An Assessment of Institutional Approaches

The inconsistency of professional development (PD) in teaching for graduate teaching assistants (GTAs) is a widespread problem in higher education. Although GTAs serve an important role in retention of undergraduate science majors and in promotion of scientific literacy in nonmajors, they often lack preparation and ongoing support for teaching. Given the recent national focus on instructional quality in introductory courses, our goal was to use an online survey to identify current practices of teaching PD for biology GTAs and compare these results with the last national survey on this topic. In responses from 71 participant institutions, 96% reported some mandatory teaching preparation for biology GTAs; however, 52% of these programs required 10 or fewer hours per year. Respondents wanted to change their programs to include more pedagogical information and teaching observations with feedback to their GTAs. Programmatic self-ratings of satisfaction with GTA PD were positively correlated with the number of topics discussed during PD. Although more schools are requiring GTA PD for teaching compared with the last national survey, the lack of program breadth at many schools warrants a national conversation with regard to recent calls for improving undergraduate instruction.     

Studying human disease genes in Caenorhabditis elegans: a molecular genetics laboratory project

Scientists routinely integrate information from various channels to explore topics under study. We designed a 4-wk undergraduate laboratory module that used a multifaceted approach to study a question in molecular genetics. Specifically, students investigated whether Caenorhabditis elegans can be a useful model system for studying genes associated with human disease. In a large-enrollment, sophomore-level laboratory course, groups of three to four students were assigned a gene associated with either breast cancer (brc-1), Wilson disease (cua-1), ovarian dysgenesis (fshr-1), or colon cancer (mlh-1). Students compared observable phenotypes of wild-type C. elegans and C. elegans with a homozygous deletion in the assigned gene. They confirmed the genetic deletion with nested polymerase chain reaction and performed a bioinformatics analysis to predict how the deletion would affect the encoded mRNA and protein. Students also performed RNA interference (RNAi) against their assigned gene and evaluated whether RNAi caused a phenotype similar to that of the genetic deletion. As a capstone activity, students prepared scientific posters in which they presented their data, evaluated whether C. elegans was a useful model system for studying their assigned genes, and proposed future directions. Assessment showed gains in understanding genotype versus phenotype, RNAi, common bioinformatics tools, and the utility of model organisms.     

Video clips for YouTube: Collaborative video creation as an educational concept for knowledge acquisition and attitude change related to obesity stigmatization

Mobile phones and advanced web-based video tools have pushed forward new paradigms for using video in education: Today, students can readily create and broadcast their own digital videos for others and create entirely new patterns of video-based information structures for modern online-communities and multimedia environments. This paradigm shift in video usage can be used for advanced learning about complex topics in higher education, for example, learning about socio-scientific or medical topics. Yet–technology aside–applicable educational concepts using collaborative video creation as a method need to be developed. In the present study, we investigate a specific concept designed to fight obesity stigmatization by developing knowledge using a learning-through-design-approach. We expected that creating videos can actually contribute to a deeper understanding of obesity and to a reduction in stigmatizing attitudes–when compared to a control condition. Dependent measures were based on the students’ video products, obesity-related knowledge and attitudes. The course group assessed their own knowledge on causes of obesity and stigmatization because of obesity higher in the post-test than a control group who read a newspaper article on the topic. A corresponding significant reduction in stigmatizing attitudes was found. In sum, results indicate significant differences between students who produced YouTube videos and a control group of students. The results are interpreted as a confirmation of our initial assumptions and evidence indicating that the program is successfully applicable in higher education.