Using the United States Census Data to Introduce Differential Equations

Abstract

This article describes a method for using the United States Census data to open a differential equations course. The question of finding a model for the United States population data gives students a first experience with creating a model using differential equations, and also understanding derivatives, what they mean, and how to calculate them in the context of real data. This model-building start motivates further exploration in many of the standard differential equations topics: the method of separation of variables, slope fields, autonomous equations, equilibria, and stability.     

The Experience of Columbian Child Soldiers from a Resilience Perspective

There are child soldiers fighting with government forces and opposition groups in more than 30 countries worldwide. Although studies have been conducted on the impact of war-related trauma on children, very few have focused on those children who do not exhibit trauma-related symptoms after experiencing armed combat. The purpose of this study was to identify and understand some of the mechanisms and resources that resilient children draw upon to overcome the trauma of child soldiering. Six Colombian child soldiers were recruited through purposive sampling techniques to participate in a narrative study focusing on their lived experiences and their personal understanding of how they were able to overcome the effects of war trauma. Six narrative themes were identified and discussed in terms of the literature on trauma and childhood resilience and also related to counselling needs and services.     

Culture, Climate, and Contribution: Career Satisfaction Among Female Faculty

Retention of female faculty is an important issue for institutions of higher education aiming for excellence and diversity. However, an essential first step in understanding retention is to examine what contributes to career satisfaction for academic women. This study is based on data from a census survey of faculty conducted in 1996 at a Research I university located in the Midwest. Using Hagadorn's (2000) model for conceptualizing faculty job satisfaction, the study identifies domains of environmental condition, departmental climate, and demographics that play a role in female faculty's overall career satisfaction.     

The role of IQ, expertise, and motivation in the recall of familiar information

High- and low-IQ children in the first, third, and fifth grades performed two free-recall tasks: a sort-recall task with sets of categorically related pictures, and a class-recall task, with children recalling the current members of their school class. All children were deemed to be experts concerning the composition of their school class, but, unlike experts in other domains, had no special motivation associated with their expertise. Recall and clustering on both tasks were high. The high-IQ children performed better than low-IQ children only on the sort-recall task. IQ was significantly correlated with measures of performance on the sort-recall task but not on the class-recall task. The results reflect the fact that the memory benefits associated with being an expert (here, elimination of IQ effects) are related to the greater knowledge the expert possesses and not to factors of motivation.     

Connective Leadership in an Interdependent and Diverse World

Expressing strong agreement with Robert Sternberg’s rationale for changing our methods for identifying intelligence, this analysis emphasizes connections with leadership failures. In recognition that a changing world requires connective ethical leadership, it discusses the nine-factor behavioral model portraying achieving styles that can facilitate effective leadership in a changing world. Leaders operating along these lines can identify high-potential initiatives and artfully adjust their behaviors to achieve the best outcomes.     

Stereotyping and Intergroup Perceptions of Disabled and Nondisabled Children: A New Perspective

This research seeks to establish relationships between the stereotypes, self‐ratings and peer‐ratings of students in an experimental secondary school attended by both disabled and nondisabled young people. To study the influence that contact with disabled classmates has upon intergroup perceptions, responses of these students were compared with those of students attending a secondary school that does not practise mainstreaming.Results vary, depending upon whether subjects were asked to attribute adjectives from a list to classmates, some of whom were disabled, or to the disabled persons in general. This research highlights the need to adopt a new approach to intergroup relations.     

Taking stock of science in the schoolhouse: four ideas to foster effective instruction

In the opening discussion of this special issue, I take stock of science and schooling for students with learning disabilities (LD) before probing four ideas to foster effective instruction in contemporary schools: (a) Turn to science as the best trick we know for solving educational problems; (b) specify clearly what we hope to achieve in our instructional decisions for students with LD; (c) rely on instruction as the best tool we have for improving student performance; and (d) cultivate-and keep-competent and caring personnel. I invite commentary, from the perspectives of researchers, practitioners, and those who prepare teachers and administrators, to assess the status of science in the schoolhouse and to offer practical strategies for how the scientific orientation of schools might be enhanced.