“The kids are terrific: It’s the job that’s tough”: The ELL teacher role in an urban context

The present study depicts an ecological portrait of the work lives of 16 ELL high school teachers in an urban context in the United States. Results suggest that their work lives take place within a complex school ecology which affects the kinds of activities they engage in and the opportunities they have to support their students. In this context they demonstrate an unusual dedication to aiding students and their families in activities related to the transition to a new country. The paper concludes with recommendations for future research explicating further the school ecology of this group of teachers.     

Unraveling Uses and Effects of an Interactive Health Communication System

By developing a number of measures distinguishing amount, type of content, and when and how that content is used, the current study revealed effective patterns of use that are associated with quality of life benefits during an eHealth intervention. Results generally suggest that the benefits depend on how a patient uses the system, far more than on sheer amount of exposure or even what type of content is chosen. The next generation of eHealth system should focus on providing new and varying content over time, but even more on encouraging intensity of use and long-term commitment to the system.     

Solving Hitchcock''s transportation problem by a genetic algorithm

Genetic algorithms (GAs) employ the evolutionary process of Darwin's nature selection theory to find the solutions of optimization problems. In this paper, an implementation of genetic algorithm is put forward to solve a classical transportation problem, namely the Hitchcock's Transportation Problem (HTP), and the GA is improved to search for all optimal solutions and identify them automatically. The algorithm is coded with C and validated by numerical examples. The computational results show that the algorithm is efficient for solving the Hitchcock's transportation problem.     

Revising Amartya Sen’s capability approach to education for ethical development

The purpose of this paper is to examine whether Amartya Sen's capability approach can suggest an appropriate theory of education for ethical development. Many advocates of Sen's capability approach insist that his approach is superior to rival theories of education, including the human capital theory. This is because Sen emphasizes the purpose and various roles of education for achieving substantial freedom while rival theories focus on the instrumental aspects of education. A focus on rival educational theories often results in the negative effects seen occurring in colonial education. In principle, we agree with the advocates of Sen’s capability approach. However, we doubt that Sen’s emphasis is sufficient for guaranteeing that his capability approach is the appropriate theory of education for application in the context of ethical development. It does not have theoretical completion, and it gives no guidance as to conflict resolution concerning the roles, or value, of education. Nor does it give guidance as to how to implement pedagogical strategies. This incompletion allows economically instrumental values to dominate intrinsic values and non-economically instrumental values, as seen with the educational Millennium Development Goals. This prioritization is what has occurred in colonial education through the application of human capital theory. We suggest that in Sen’s capability approach, firstly, the meaning of the intrinsic value of education should be clarified; secondly, the non-economically instrumental roles of education should be explicated in the context of development; and finally, the priority of the intrinsic and the non-economically instrumental roles of education value should be taken over the economically instrumental values. In this revised theory, people’s substantive freedom is achievable through education, people’s aboriginal identities and values remain intact, and developing countries take seriously pedagogical strategies.     

Effects of Pre‐structuring Discussion Threads on Group Interaction and Group Performance in Computer‐supported Collaborative Argumentation

This study examined the effects of pre‐structuring discussion threads on group performance in computer‐supported collaborative argumentation where students labeled their messages as arguments, challenges, supporting evidence, and explanations on a threaded discussion board. In the pre‐structured group students were required to post supporting and opposing arguments to designated and separate discussion threads. In the control group no discussion threads were designated for posting supporting and opposing arguments. The mean number of challenges elicited per argument was 64% greater with pre‐structured threads (ES = +.47). No significant differences were found in the mean number of counter‐challenges, supporting evidence, and explanations posted in reply to challenges. The findings suggest that prestructured discussion threads can increase the frequency of argument→challenge exchanges needed to initiate critical discourse.     

Roles of Abductive Reasoning and Prior Belief in Children’s Generation of Hypotheses about Pendulum Motion

The purpose of the present study was to test the hypothesis that student’s abductive reasoning skills play an important role in the generation of hypotheses on pendulum motion tasks. To test the hypothesis, a hypothesis-generating test on pendulum motion, and a prior-belief test about pendulum motion were developed and administered to a sample of 5th grade children. A significant number of subjects who have prior belief about the length to alter pendulum motion failed to apply their prior belief to generate a hypothesis on a swing task. These results suggest that students’ failure in hypothesis generation was related to abductive reasoning ability, rather than simple lack of prior belief. This study, then, supports the notion that abductive reasoning ability beyond prior belief plays an important role in the process of hypothesis generation. This study suggests that science education should provide teaching about abductive reasoning as well as scientific declarative knowledge for developing children’s hypothesis-generation skills.