Students’ Energy Concepts at the Transition Between Primary and Secondary School

Energy is considered both a core idea and a crosscutting concept in science education. A thorough understanding of the energy concept is thought to help students learn about other (related) concepts within and across science subjects, thereby fostering scientific literacy. This study investigates students’ progression in understanding the energy concept in biological contexts at the transition from primary to lower secondary school by employing a quantitative, cross-sectional study in grades 3–6 (N?=?540) using complex multiple-choice items. Based on a model developed in a previous study, energy concepts were assessed along four aspects of energy: (1) forms and sources of energy, (2) transfer and transformation, (3) degradation and dissipation, and (4) energy conservation. Two parallel test forms (A and B) indicated energy concept scores to increase significantly by a factor of 2.3 (A)/1.7 (B) from grade 3 to grade 6. Students were observed to progress in their understanding of all four aspects of the concept and scored highest on items for energy forms. The lowest scores and the smallest gain across grades were found for energy conservation. Based on our results, we argue that despite numerous learning opportunities, students lack a more integrated understanding of energy at this stage, underlining the requirement of a more explicit approach to teaching energy to young learners. Likewise, more interdisciplinary links for energy learning between relevant contexts in each science discipline may enable older students to more efficiently use energy as a tool and crosscutting concept with which to analyze complex content.     

Calibration of two objective measures of physical activity for children

A calibration study was conducted to determine the threshold counts for two commonly used accelerometers, the ActiGraph and the Actical, to classify activities by intensity in children 5 to 8 years of age. Thirty-three children wore both accelerometers and a COSMED portable metabolic system during 15 min of rest and then performed up to nine different activities for 7 min each, on two separate days in the laboratory. Oxygen consumption was measured on a breath-by-breath basis, and accelerometer data were collected in 15-s epochs. Using receiver operating characteristic curve (ROC) analysis, cutpoints that maximised both sensitivity and specificity were determined for sedentary, moderate and vigorous activities. For both accelerometers, discrimination of sedentary behaviour was almost perfect, with the area under the ROC curve at or exceeding 0.98. For both the ActiGraph and Actical, the discrimination of moderate (0.85 and 0.86, respectively) and vigorous activity (0.83 and 0.86, respectively) was acceptable, but not as precise as for sedentary behaviour. This calibration study, using indirect calorimetry, suggests that the two accelerometers can be used to distinguish differing levels of physical activity intensity as well as inactivity among children 5 to 8 years of age.     

Celebration and Separation: A Troublesome Approach to Multicultural Education

Middle school classrooms can be fertile ground for positively impacting students' cultural and racial assumptions and understanding, given an effective multicultural curriculum and school structure. This article presents a narrative of the author's contrasting experiences teaching a text with racial themes. Applicable literature provides a framework for explaining the students' differing levels of receptivity towards the text. Three particular areas of study provide the framework for explaining student response: a school's approach to multicultural literature; school structure, in particular, tracking; and theories of racial identity development. In addition, the author challenges adults involved in the educational system to implement truly multicultural approaches to learning, despite the potential discomfort or unpopularity of such change.     

Head start children''s conceptions of and expectations for their future schooling

This study examined children's conceptions of and expectations for their future schooling, determined whether participation in a Transition Demonstration could affect these, and explored how these are related to children's academic achievement. Two cohorts, 151 former Head Start children completing kindergarten, and 171 children completing Head Start, were assessed. Two major themes in children's conceptions of school emerged: play and the cognitive or learning environment. Children realistically talked about the work of school becoming less play centered, more difficult, and more centered on academics as they moved from grade to grade. Children in the Demonstration group in both cohorts gave significantly more responses to the questions than those in the Comparison. Children's expectations for their future schooling were optimistic. There were several small but significant correlations between children's conceptions and expectations for school and their academic achievement as measured by subtests of the Wood-cock-Johnson-R.     

Examining the role of Web site information in facilitating different citizen–government relationships: A case study of state Chronic Wasting Disease Web sites

This paper develops a framework to assess the text-based public information provided on program level government agency Web sites. The framework informs the larger e-government question of how, or whether, state administrative agencies are using Web sites in a transformative capacity—to change relationships between citizens and government. It focuses on assessing the degree to which text information provided on government Web sites could facilitate various relationships between government agencies and citizens. The framework incorporates four views of government information obligations stemming from different assumptions about citizen–government relationships in a democracy: the private citizen view, the attentive citizen view, the deliberative citizen view, and the citizen–publisher view. Each view suggests inclusion of different types of information on government agency web sites. The framework is employed to assess state Web sites containing information about chronic wasting disease, a disease effecting deer and elk in numerous U.S. states and Canada.     

Childhood Maltreatment and Early Developmental Vulnerabilities at Age 5 Years

This study examined associations between maltreatment and early developmental vulnerabilities in a population sample of 68,459 children (M_age = 5.62 years, SD = .37) drawn from the Australian state of New South Wales, using linked administrative data for the children and their parents (collected 2001–2009). Associations were estimated between (a) any maltreatment, (b) the number of maltreatment types, and (c) the timing of first reported maltreatment and vulnerability and risk status on multiple developmental domains (i.e., physical, social, emotional, cognitive, and communication). Pervasive associations were revealed between maltreatment and all developmental domains; children exposed to two or more maltreatment types, and with first maltreatment reported after 3 years of age, showed greater likelihood of vulnerability on multiple domains, relative to nonmaltreated children.     

Response Time Differences Between Computers and Tablets

Item response time data were used in investigating the differences in student test-taking behavior between two device conditions: computer and tablet. Analyses were conducted to address the questions of whether or not the device condition had a differential impact on rapid guessing and solution behaviors (with response time effort used as an indicator) as well as on the time that students spent on the test (reading, mathematics, and science) or a given item type (such as drag-and-drop and fill in blank). Further analyses were conducted to examine if the potential impact of device conditions varied by gender and ethnicity groups. Overall there were no significant differences in response time effort related to device, although some differences related to item type and test sequence were noted. Students tended to spend slightly more time when taking the tests and certain types of items on the tablet than on the computer. No interactions of device with gender or ethnicity were observed. Follow-up research on the item time thresholds is discussed.