Plus/minus grading and motivation: an empirical study of student choice and performance

This paper considers whether student motivation might be impacted by the replacement of a straight (A, B, C, D, F) grading system with a plus/minus system (A, A?, B+ … D?, F). The data that are examined are from several undergraduate economics classes at a mid‐sized midwestern university in the United States. The data includes student characteristics, student performance and students’ choices of either a plus/minus or a straight grading system. In this admittedly small‐scale study students, who chose plus/minus grading, were not significantly more motivated than students who opted for straight grading.     

Space and time in life and science

Space and time are concepts that seem to be embedded in our very consciousness. As we grow up, our ‘intuitive understanding’ of these concepts seems to grow as well. And yet the fact is that our understanding of space-time in the deepest scientific sense is far from complete, although we have covered a considerable distance along the route. There may still be many surprises awaiting us on the road ahead.     

Family systems theory and school psychology: Implications for training and practice

The purpose of this article is to: (a) present an overview of family systems perspectives as they relate to the functioning of the school psychologist, (b) review briefly current available levels of family intervention, and (c) present guidelines for training school psychologists in family dynamics and family therapy. The position is taken that a family systems approach is complex and necessitates extensive coursework in family theory and therapy approaches, practica, and field supervision. As a result, while a family systems perspective is essential, family therapy will not in all probability be standard in entry level training programs, but should be a specialty level or doctoral level option.     

Molecule matters Dendritic architecture a clever route to monodispersed macromolecules

Dendritic macromolecules are excellent examples for macromolecules that possess well-defined branching that develops from a core to the periphery. The pseudospherical structure of dendrimers has opened up numerous possibilities for interesting applications.     

Operationalizing and validating disciplinary literacy in secondary education

The goal of this study was to define the construct and establish the validity of disciplinary literacy, which has recently gained attention from the implementation of the Common Core State Standards (National Governors Association Center for Best Practices & Council of Chief State School Officers in Common Core State Standards for English language arts & literacy in history/social studies, science, and technical subjects [PDF]. Authors, Washington, DC, 2010). After defining disciplinary literacy in the four core disciplines of English language arts, science, history and social studies, and mathematics, scales were developed and administered to a snowball sample of professionals nationwide, with 857 respondents. The data showed evidence of disciplinary literacy as a multidimensional construct with three related factors: source literacy, analytic literacy, and expressive literacy. Based on EFA and CFA results, we can conclude that there are at least three types of literacy in operation among the four core disciplines. The three factors of literacy varied significantly by the four core disciplines of English/language arts (ELA), science, history and social studies, and mathematics, supporting the notion that each discipline uses literacy uniquely. This is the first study of its kind to attempt to define, quantify, and validate the construct of disciplinary literacy.