SCHOOL RACIAL CLIMATE AND THE ACADEMIC ACHIEVEMENT OF AFRICAN AMERICAN HIGH SCHOOL STUDENTS: THE MEDIATING ROLE OF SCHOOL ENGAGEMENT

This investigation utilized an integrative model of development for ethnic minority children and a process model of engagement to explore whether three dimensions of school engagement (behavioral, emotional, and cognitive) mediated relationships between school racial climate, academic performance, and educational aspirations. A total of 139 African American students were recruited from a high school in the southeastern United States. Findings revealed an indirect association between perceptions of racial fairness and academic achievement indicators through behavioral and cognitive engagement. Behavioral and cognitive engagement also mediated relationships between youths’ perceived peer discrimination and academic achievement indicators. No significant indirect associations between teacher discrimination and academic achievement through school engagement dimensions were found. Study limitations, future directions, and implications are discussed.     

A collaborative assessment of students’ placement learning

The research informing this paper set out to investigate the qualitative experiences of students, supervisors and tutors involved in a summative collaborative assessment of placement learning on an undergraduate professional qualifying programme in the UK. Analysis of data gathered through semi-structured interviews provides valuable insights into its use. In particular, engagement in a collaborative assessment brings a degree of exposure for all concerned. Participants need to feel ‘able’ to participate, and ability to participate is linked to notions of agency and autonomy. Collaborative assessment design needs to acknowledge power relations and include strategies to reduce imbalances. The importance of recognising and working with the complexities of assessment should not be underestimated. Criterion referencing offers a guide to support consistency but can also falsely present assessment as mechanistic and instrumental. The research shows that it is in the ‘doing’ of assessment that a ‘shared language’ is developed. It demonstrates the value of active student engagement in assessment in relation to the construction and use of theory, developing reflective practice and assessment literacy. The collaborative assessment provides students with the opportunity to experience a ‘performance of understanding’ in a community of practice that, whilst pressured, reflects ‘real’ professional life.     

Learning/work: Turning work and lifelong learning inside out

CONFINTEA VI took place against the background of an uneven and contradictory social and economic impact of globalisation. This impact registered globally and locally, in both the political North and South, drawing new lines of inequality between “core” and “periphery”, between insiders and outsiders of contemporary society. Financial turmoil in the world has exacerbated levels of poverty and insecurity. The question is how work-related education and conceptions of learning might promote greater inclusion and security for those whose livelihoods are most severely affected by globalisation. The Belém Framework for Action implicitly recognises that lifelong learning and work cannot be discussed outside broader socio-economic and political contexts. The authors of this article draw substantially on research from around the world and argue for the re-insertion of “politics and power” into both the theory and practice of “lifelong learning” and “work”.     

School Library Media Specialist-Teacher Collaboration: Characteristics, Challenges, Opportunities

The most successful school library media specialists are those who collaborate with teachers as full partners in the instructional process. Without assertive action by the school library media specialist, however, school administrators and teachers are likely to be more aware of the media specialist’s administrative role than the roles of teacher, instructional partner, and information specialist. Reductions to library media staff and finding common planning time are examples of serious challenges, but these are not insurmountable. In the context of well-planned instructional projects, collaboration with teachers is a primary way that school library media professionals can demonstrate that their work is a vital part of the academic life of their schools, and a positive factor in improving student achievement.     

Bandpass sorting of heterogeneous cells using a single surface acoustic wave transducer pair

Separation and sorting of biological entities (viruses, bacteria, and cells) is a critical step in any microfluidic lab-on-a-chip device. Acoustofluidics platforms have demonstrated their ability to use physical characteristics of cells to perform label-free separation. Bandpass-type sorting methods of medium-sized entities from a mixture have been presented using acoustic techniques; however, they require multiple transducers, lack support for various target populations, can be sensitive to flow variations, or have not been verified for continuous flow sorting of biological cells. To our knowledge, this paper presents the first acoustic bandpass method that overcomes all these limitations and presents an inherently reconfigurable technique with a single transducer pair for stable continuous flow sorting of blood cells. The sorting method is first demonstrated for polystyrene particles of sizes 6, 10, and 14.5 μm in diameter with measured purity and efficiency coefficients above 75 ± 6% and 85 ± 9%, respectively. The sorting strategy was further validated in the separation of red blood cells from white blood cells and 1 μm polystyrene particles with 78 ± 8% efficiency and 74 ± 6% purity, respectively, at a flow rate of at least 1 μl/min, enabling to process finger prick blood samples within minutes.