Students’ Development of Representational Competence Through the Sense of Touch

Electromagnetism is an umbrella encapsulating several different concepts like electric current, electric fields and forces, and magnetic fields and forces, among other topics. However, a number of studies in the past have highlighted the poor conceptual understanding of electromagnetism concepts by students even after instruction. This study aims to identify novel forms of “hands-on” instruction that can result in representational competence and conceptual gain. Specifically, this study aimed to identify if the use of visuohaptic simulations can have an effect on student representations of electromagnetic-related concepts. The guiding questions is How do visuohaptic simulations influence undergraduate students’ representations of electric forces? Participants included nine undergraduate students from science, technology, or engineering backgrounds who participated in a think-aloud procedure while interacting with a visuohaptic simulation. The think-aloud procedure was divided in three stages, a prediction stage, a minimally visual haptic stage, and a visually enhanced haptic stage. The results of this study suggest that students’ accurately characterized and represented the forces felt around a particle, line, and ring charges either in the prediction stage, a minimally visual haptic stage or the visually enhanced haptic stage. Also, some students accurately depicted the three-dimensional nature of the field for each configuration in the two stages that included a tactile mode, where the point charge was the most challenging one.     

Bioconversion of low quality lignocellulosic agricultural waste into edible protein by <Emphasis Type="Italic">Pleurotus sajor-caju</Emphasis> (Fr.) singer

Pleurotus sajor-caju (Fr.) Singer was cultivated on selected agro wastes viz. cotton stalks, groundnut haulms, soybean straw, pigeon pea stalks and leaves and wheat straw, alone or in combinations. Cotton stalks, pigeon pea stalks and wheat straw alone or in combination were found to be more suitable than groundnut haulms and soybean straw for the cultivation. Organic supplements such as groundnut oilseed cake, gram powder and rice bran not only affected growth parameters but also increased yields. Thus bioconversion of lignocellulosic biomass by P. sajor-caju offers a promising way to convert low quality biomass into an improved human food.     

Analysis of insoluble fiber components in common Indian foods and habitual diets

Dietary fiber components e.g. cellulose, hemicellulose and lignin are estimated in 53 commonly consumed Indian foods, with an objective to get an estimate of habitual level of intakes in Indians. Results indicate that there is a wide range of variation in Indian foods in cellulose, hemicellulose and lignin content for all the classes of Indian foods. This is useful to modify the diets with varying proportions of fiber but giving the same level of calories. When our values were compared with fifteen values obtained by Kamat and Belavady (1) and nine values of Anuradhaet al (7) the values were found to be comparable (P>.01). However they were significantly different (P<.01) when compared with eleven values of Premakumari (8). A computer program FIBER. INT based on cooked factors is developed for the calculation of habitual level of cellulose, hemicellulose and lignin for Indian diets. Total NDF is in the range 20.5–47.6 grams per day for 28 adult males and 15.2–26.1 grams per day for 6 females. However fiber expressed as gram per 1000 calories is 13.1 in females as compared to 11.9 in males. Diets with combination of wheat and sorghum were highest in fiber content (12.5 gram per 1000 K calories).     

The Brink of Change: Gender in Technology-Rich Collaborative Learning Environments

This study was designed to contribute to a small but growing body of knowledge on the influence of gender in technology-rich collaborative learning environments. The study examined middle school students attitudes towards using computers and working in groups during scientific inquiry. Students attitudes towards technology and group work were analyzed using questionnaires. To add depth to the findings from the survey research, the role of gender was also investigated through the analysis of student conversations in the context of two activities: exploring science information on a hypertext text and conducting hands-on investigations. The data suggest that not only are girls and boys are similar with regard to attitudes about computers and group work, but that during collaborative learning activities, girls may actually participate more actively and persistently regardless of the nature of the task.     

Pedagogical Affordances of Multiple External Representations in Scientific Processes

Multiple external representations (MERs) have been widely used in science teaching and learning. Theories such as dual coding theory and cognitive flexibility theory have been developed to explain why the use of MERs is beneficial to learning, but they do not provide much information on pedagogical issues such as how and in what conditions MERs could be introduced and used to support students?? engagement in scientific processes and develop competent scientific practices (e.g., asking questions, planning investigations, and analyzing data). Additionally, little is understood about complex interactions among scientific processes and affordances of MERs. Therefore, this article focuses on pedagogical affordances of MERs in learning environments that engage students in various scientific processes. By reviewing literature in science education and cognitive psychology and integrating multiple perspectives, this article aims at exploring (1) how MERs can be integrated with science processes due to their different affordances, and (2) how student learning with MERs can be scaffolded, especially in a classroom situation. We argue that pairing representations and scientific processes in a principled way based on the affordances of the representations and the goals of the activities is a powerful way to use MERs in science education. Finally, we outline types of scaffolding that could help effective use of MERs including dynamic linking, model progression, support in instructional materials, teacher support, and active engagement.     

Multiculturalism,Teaching Slavery,and White Supremacy

This article argues that multiculturalism, especially when it is led and controlled by Whites, and in the absence of collective anti-racist struggles, can reproduce the ontologies, epistemologies, and practices of white supremacy. I use a case study of a reenactment of Atlantic black slavery, produced by white teachers to investigate whether multiculturalism can be more than a technology of white supremacy. I conclude that by employing the restored behaviors of slavery, the reenactment failed to add to an interrogation of whiteness and anti-racism. Instead of contributing to the reformation of whiteness and the empowering of Blacks, it reinforced anti-blackness. I end with a discussion of how to teach slavery ethically.     

Trends in the payoff to academic and occupation-specific skills: the short and medium run returns to academic and vocational high school courses for non-college-bound students

Using data from three longitudinal surveys of American high school students, I show that vocational courses helped non-college-bound students to start their work life more successfully. A comparison of the returns to academic and vocational course work for non-college-bound students who graduated in 1972, 1980 and 1992 finds that the short and medium term payoffs to vocational courses rose substantially between 1972 and 1980 and remained high in 1992. Holding a host of variables constant, academic course work had much smaller labour market payoffs than vocational course work. These findings contradict the often repeated claim that employers now seek workers with a good general education and are happy to teach the occupation specific skills necessary to do the job. High school students who do not plan to attend college full-time would be well advised to start studying a well paying occupation before they complete high school. [JEL: I20, J23, J24]     

From Competence in the Curriculum to Competence in Action

The article begins by drawing a distinction between the concepts of “curriculum” and “programme of study”, and goes on to show that curriculum reform involves much more than simply rewriting programmes of study. The reforms that are presently sweeping across education systems throughout the world qualify, in many cases, as true paradigm revolutions, given the magnitude of the transition from an objectives-based to a competency-based pedagogy. The authors discuss the complex nature of a situated approach to competence by exploring the theoretical foundations of a number of contemporary perspectives: situated action/cognition, distributed cognition/intelligence, collective intelligence and enaction. The value of a situated approach to competence is that it goes beyond an objectives-based pedagogy, while at the same time incorporating the best of what it has to offer. Original language: French Philippe Jonnaert (Belgium) Doctoral degree in educational studies from the Université de Mons; formerly, a professor at the Université de Louvain-la-Neuve in Belgium and the University of Sherbrooke in Canada; a visiting professor at the Université René Descartes, Paris 5-Sorbonne; he is currently a full professor at the Université du Québec à Montréal (UQàM); director of the Observatoire des réformes en education (ORé); and consultant to various international organizations on issues related to curriculum development. E-mail: philippejonnaert@yahoo.ca Domenico Masciotra (Canada) Doctorate in educational studies from UQáM and completed post-doctoral studies at the Massachussetts Institute of Technology; he is a researcher for ORé and consultant to the Ministère de l’éducation, du loisir et du sport (MELS) of Quebec. E-mail: masciotra.domenico@videotron.ca Johanne Barrette (Canada) A graduate student in a doctoral programme of educational studies at UQáM; her dissertation concerns informal and tacit learning acquired through practice in business settings. She has worked as an educational consultant for adult education in the workplace; as an adult education teacher; as a project manager in charge of a number of Quebec-based and international projects on the development of competencies in the workplace; and is currently a researcher at ORé. E-mail: barsav@sympatico.ca Denise Morel (Canada) Denise Morel holds two master’s degrees: in philosophy (McGill University, Montreal) and in Applied Linguistics (Concordia University, Montreal); has worked as a teacher, educational consultant and analyst for the English Montreal School Board, and as a part-time lecturer at Concordia University; has participated in several programme development projects for the MELS of Quebec, and collaborates with ORé. E-mail: dmorel@emsb.qc.ca Yaya Mane (Canada) Holds a doctorate in educational studies from the Université Montréal; has taught at the Institut supérieur des sciences de l’éducation de Guinée (ISSEG); he is presently a lecturer in the Faculty of Education at the Université Montréal;, a research officer at the Centre interdisciplinaire de la formation de la profession enseignante (CRIFPE) at the Université Montréal;, and a researcher at ORé. E-mail: yaya.mane@umontreal.ca     

Distributed Scaffolding: Scaffolding Students in Classroom Environments

Educational Psychology Review - This paper traces the origins of the scaffolding construct, placing it in its theoretical-historical context. The paper discusses the connection between...     

Editors' Note

Although educational research and practice has found many benefits of long-term and complex design activities, an issue of growing concern is that students might lose sight of science learning while diverting their attention to design aesthetics, collaborative management, and technology. A question is whether or not science is actually separate from these aspects; it may be that science permeates the design environment and is thus contexted within these other activities. To investigate this possibility we followed a classroom of 33 students, divided into 7 teams, and we examined their science discussions as they planned for creating instructional software designs. Specifically, we investigated which conversational contexts gave rise to science talk. We found that a focus on the fine-grained details of the instructional science designs themselves and the contributions of more design-experienced students played an important role in the sophistication of the science content in the planning discussions. In examining less productive contexts for science talk, we found that a conversational focus in planning discussions on collaboration and software issues, as well as the science focus of the software designs, impacted the quality of science integration. In our discussion, we address the issue of which design contexts afford opportunities for richer discourse and the implications for other project-based design activities.