Racism and Stereotypes in Electronic Media

This article discusses how racial, ethnic, and sexual stereotypes find their way into electronic media, both television and games. This article is presented here to help librarians understand the ethnic, racial, and sexual biases that are built into electronic communication and the importance of thoughtful media literacy analysis in watching over the electronic media that come into their collections and programs.     

Educational Video

Ignacy Waniewicz's Broadcasting for Adult Education (Paris: Unesco [available in this country from New York: Unipub, Inc.], 1972–$4.50, paper)

Alan Hancock's Planning for ETV: A Handbook of Educational Television (New York: Humanities Press, 1972—$12.50)

John Quick and Herbert Wolff's Small-Studio Video Tape Production (Reading, Mass.: Addison-Wesley, 1972—$11.95)

Fred Powledge's Public Television: A question of Survival (Washington, D.C.: Public Affairs Press, 1972—$1.00, paper)     

Exploring the effects of group testing on graduate students’ motivation and achievement

This study explored the impact of individual versus two‐person group testing on graduate students’ achievement and motivation to learn while enrolled in a 16‐lesson educational research methods course. Students in two sections of the course were exposed to the same content and instructional methods, with one exception: students in one section took three professor‐created, criterion‐referenced examinations (during lessons 6, 11 and 16) individually, whereas students in the other section took the same examinations with a partner with whom they could examine and discuss the test items in order to derive a common answer. At the end of the course, the motivation to learn of all students was assessed. Results revealed that students tested with a partner achieved significantly higher scores on two of the examinations and demonstrated significantly higher levels of motivation to learn than did students taking the examinations alone. Qualitative analysis of the students’ written expressions concerning the course and of their comments from group and individual interviews revealed possible explanations for these outcomes.     

Associations between school absence and academic achievement: Do socioeconomics matter?

This study examined the extent to which the association between increased student absence and lower achievement outcomes varied by student and school‐level socioeconomic characteristics. Analyses were based on the enrolment, absence and achievement records of 89,365 Year 5, 7 and 9 students attending government schools in Western Australian between 2008 and 2012. Multivariate multi‐level modelling methods were used to estimate numeracy, writing and reading outcomes based on school absence, and interactions between levels of absence and school socioeconomic index (SEI), prior achievement, gender, ethnicity, language background, parent education and occupation status. While the effects of absence on achievement were greater for previously high‐achieving students, there were few significant interactions between absence and any of the socioeconomic measures on achievement outcomes. The results of first‐difference regression models indicated that the negative effect of an increase in absence was marginally larger for students attending more advantaged schools, though most effects were very small. While students from disadvantaged schools have, on average, more absences than their advantaged peers, there is very little evidence to suggest that the effects of absence are greater for those attending lower‐SEI schools. School attendance should therefore be a priority for all schools, and not just those with high rates of absence or low average achievement.     

The Literacy Hour: a case for listening to children

Despite a professional rhetoric about the importance of consulting children, there is reason to think that many teachers continue to disregard children's views in their dayto-day practice. The Literacy Hour, with its detailed content and prescribed pedagogic structure, leaves teachers, teaching assistants and children very little room for comment or change. This article reports on a small-scale interview study involving 48 children. The study aimed to understand children's experiences of the Literacy Hour. It is suggested that their comments should serve to inform professional practice. They raise important considerations related to teaching and learning and also provide reasons for questioning if the hour is as complete an answer to literacy teaching as it is claimed to be.     

Conceptualizing a Theoretical Model for School-Centered Adolescent Physical Activity Intervention Research

Adolescent physical inactivity has risen to an alarming rate. Several theoretical frameworks (models) have been proposed and tested in school-based interventions. The results are mixed, indicating a similar weakness as that observed in community-based physical activity interventions (Baranowski, Lin, Wetter, Resnicow, & Hearn, 1997). The theoretical models were decontextualized, thus are unable to address issues central to adolescents' physical activity behavior. In this article, we propose using a theoretical model derived from school-based research on learning behavior change. We review related research on adolescents' physical activity to demonstrate the relevance of using the model to study the dynamic impact of personal, school curriculum, and community variables on adolescent physical activity. We also translate the conceptual model into empirically testable cross-sectional and longitudinal latent growth models and propose concrete steps researchers can take to design empirical studies to examine them. We believe that research studies guided by the proposed conceptual and empirical models will provide useful data for us to better understand the mechanisms of adolescent physical activity motivation and behavior change.     

Lectin-functionalized microchannels for characterizing pluripotent cells and early differentiation

Embryonic stem (ES) cells are capable of proliferating and differentiating to form cells of the three embryonic germ layers, namely, endoderm, mesoderm, and ectoderm. The utilization of human ES cell derivatives requires the ability to direct differentiation to specific lineages in defined, efficient, and scalable systems. Better markers are needed to identify early differentiation. Lectins have been reported as an attractive alternative to the common stem cell markers. They have been used to identify, characterize, and isolate various cell subpopulations on the basis of the presentation of specific carbohydrate groups on the cell surface. This article demonstrates how simple adhesion assays in lectin-coated microfluidic channels can provide key information on the interaction of lectins with ES and definitive endoderm cells and thereby track early differentiation. The microfluidic approach incorporates both binding strength and cell surface receptor density, whereas traditional flow cytometry only incorporates the latter. Both approaches are examined and shown to be complementary with the microfluidic approach providing more biologically relevant information.