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When less is sometimes more: Optimal learning conditions are required for schema acquisition from mu
While it is usually claimed that multiple examples for the illustration of problem categories are a necessary prerequisite for schema acquisition, there is a lack of conclusive empirical evidence supporting this claim. Moreover, there are findings indicating that carefully designed one-example conditions may allow for profitable processes of example comparison as well. In line with this reasoning, we present an experiment – that builds up on a series of studies conducted by Quilici and Mayer (1
Author(s): Scheiter Katharina,Gerjets Peter

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Meanings for Fraction as Number - Measure by Exploring the Number Line
Construction of meanings for fraction as number-measure is studied during the implementation of exploratory tasks concerning comparison and ordering of fractions as well as operations with fractions. 12-year-old students were working collaboratively in groups of two with software that combines graphical and symbolic notation of fractions represented as points on the number line. Fractions as points and segments, ordering fractions as part of kinesthetic activities and abstracting the scaling of
Author(s): Psycharis Giorgos,Latsi Maria,Kynigos Chronis

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Internet Scout Project
Carried by Lamont-Doherty Earth Observatory (LDEO) of Columbia University, the Petrological Database of the Ocean Floor is a National Science Foundation (NSF) funded research project that includes over 30,000 samples and over 700,000 chemical values from oceanic stations throughout the world. Samples can be searched by location, expedition name, ship name, sample characteristics, reference, or by chemistry. A typical result might include the sample id, description, age, date, tectonic setting, l
Author(s): No creator set

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Flexibility in macro-scripts for computer-supported collaborative learning
In the field of computer-supported collaborative learning (CSCL), scripts are designed to support collaboration among distant learners or co-present learners whose interactions are (at least partially) mediated by a computer. The rationale of scripts is to structure collaborative learning processes in order to trigger group interactions that may be rare in free collaboration. Fixing the degree of coercion is a delicate design choice: too rigid scripts would spoil the richness of collaborative in
Author(s): Dillenbourg Pierre,Tchounikine Pierre

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Extending the Scope of Asynchronous Collaboration: a Matter of Being Autonomous and Self-sufficient
Asynchronous collaborative applications and systems have to deal with complexities associated with interaction nature, idiosyncrasy of groups and technical and administrative issues. Inclusion of requirements derived from them is costly (in time, resources and economically). Existing solutions addresses asynchronous collaboration via simplification of requirements and by using centralized models. In this paper we present LaCOLLA, a fully decentralized infrastructure for building collaborative ap
Author(s): Marquès Joan Manuel,Navarro Leandro,Daradoumis Th

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Supporting Effective and Useful Web-based Distance Learning
Learners interacting in a Web-based distance learning environment produce a variety of information elements during their participation; these information elements usually have a complex structure and semantics, which makes it rather difficult to find out the behavioral attitudes and profiles of the users involved. User modelling in on-line distance learning is an important research field focusing on two important aspects: describing and predicting students’ actions and intentions as well as ada
Author(s): Caballé Santi,Daradoumis Thanasis,Xhafa Fatos,Est

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Contextualizing Discussions in Distance Learning Systems
In distance learning systems, communication tools are rarely integrated into learning activities, which does not encourage their use. The main goal of our work is to mitigate this lack of integration. Our aim is to bring the discussion activities closer to the learning activities, i.e. to situations to which the discussions must ideally relate to in order to promote learning between students. Thus, we suggest two models of forum which are contextual and based on a structuring of discussions resp
Author(s): George Sébastien

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Internet Scout Project
This Topic in Depth explores the field of surface chemistry. First, the American Chemical Society's (ACS) Division of Colloid and Surface Chemistry publicizes its members initiatives to "investigate the interaction of surfaces with fluids having molecular densities spanning the range from liquids to ultra-high vacuum" (1). Researchers can find out about upcoming meetings, awards, and membership opportunities. The second website presents Chalmers University of Technology's research activities in
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Internet Scout Project
Electronic sensors exist in many facets of our lives, from measuring operating conditions of our vehicles to adjusting the temperature of our homes. They can even mean the difference between life and death when used to monitor patients in emergency rooms. Even though sensors work transparently in their multitude of functions, their importance cannot be understated.Sensorland (1) has basic descriptions of a wide variety of sensors and related concepts. Out of the 50 items in the list, some have f
Author(s): Leske, Cavin.

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Internet Scout Project
The New York Times Daily Lesson Plan website regularly features lesson plans for grades for six through twelve on a variety of topics. In this lesson plan, entitled "No Place Like Home: Arguing for the Protection of Endangered Species," students research and present analysis on the impact of the physical environment on an endangered species. Based on their investigations, they also create "a plan for the ideal care of the species" and develop an advertisement that is intended to promote awarenes
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Narrative Evolution: Learning from Students' Talk about Species Variation
Learners do not always enjoy productive interactions with Multimedia Interactive Learning Environments. Their attention can be distracted away from the educational focus intended by designers and teachers through poor design and operational inadequacy. In this paper we describe a study of groups of learners using a multimedia CD-ROM research tool called Galapagos. This tool was developed to enable us to observe groups of learners interacting with different versions of the same multimedia content
Author(s): Luckin Rosemary,Plowman Lydia,Laurillard Diana,Str

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Theory of Supercritical Fluid Extraction via the Discovery Approach
An experiment using supercritical fluid extraction is described. The authors have devised the experiments for an undergraduate audience. The paper is intended for educators and faculty in charge of a physical or analytical chemistry lab.
Author(s): Mauldin, Robert

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Copyright The Chemical Educator 1996-2003

MArCo: Building an Artificial Conflict Mediator to Support Group Planning Interactions
The emphasis on building co-operative/collaborative environments has brought out the matter of group interactions. This, in its turn, has highlighted the issue of conflicts, inherent to group problem solving. If well employed, conflicts can act as triggers of cognitive changes, and thus help to refine the group's solution to the task. In this paper, we present a computational framework for detecting and mediating Meta-Cognitive conflicts. The theoretical framework presented here enables a comput
Author(s): Azevedo Tedesco Patricia

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Looking Ahead to Select Tutorial Actions: A Decision-Theoretic Approach
We propose and evaluate a decision-theoretic approach for selecting tutorial actions by looking ahead to anticipate their effects on the student and other aspects of the tutorial state. The approach uses a dynamic decision network to consider the tutor’s uncertain beliefs and objectives in adapting to and managing the changing tutorial state. Prototype action selection engines for diverse domains – calculus and elementary reading – illustrate the approach. These applications employ a rich mod
Author(s): Murray R. Charles,VanLehn Kurt,Mostow Jack

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A Collaborative Case Study System For Distance Learning
Distance Learning from Case Studies involves enabling collaboration between two or more learners at a distance on a case study activity. In this paper we present an empirical qualitative study that simulates a learning scenario in which a pair of subjects at a distance are provided with a collaborative learning environment and required to collaborate in order to solve a case study. The results of this empirical qualitative study have implications that informed the design of a system: LeCS (Learn
Author(s): Rosatelli Marta C.,Self John

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Modélisation formelle en sciences expérimentales : problématiques de la transmission
Cette note de synthèse rédigée en vue de soutenir une habilitation à diriger des recherches (HDR) propose une relecture de mes travaux de recherche sur la modélisation en physique statistique et en écologie comportementale ayant pour but de dégager des problématiques de la modélisation en sciences expérimentales et de les traduire ensuite en problématiques de la transmission. Dans une première partie, je présente mes travaux en me plaçant du point de vue des modèles que j’ai util
Author(s): Ney Muriel

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Les graphes argumentatifs interactifs sur Internet : sont-ils plus efficaces comme média du débat
Nous présentons les résultats d'une expérience menée dans le cadre du projet européen SCALE. Le but de cette recherche était d'étudier l'influence du type d'utilisation du graphe argumentatif durant des débats pédagogiques sur Internet. Précisément, il s'agissait de savoir sur le graphe argumentatif était plus efficace lorsqu'il était utilisé comme médium du débat (C1) ou comme moyen de le représenter (C2). Dans cet objectif, nous avons évalué à l'aide d'une méthode original
Author(s): Molinari Gaëlle,Baker Michael J.,Sejourne Arnauld

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Flexible navigation for the pedagogical hypermedia design and evaluation improvement
We are working on a method, called CEPIAH, for the design and the evaluation of pedagogical hypermedia. We propose a web based system used to help teachers to design hypermedia documents and to evaluate their prototypes. Having already elaborated a methodology for the evaluation of interactive pedagogical hypermedia (EMPI), the experience and the acknowledgement we have is able to upgrade the design help. To help the designer in his instructional Web site creation we developed an interactive gui
Author(s): Giacomini Pacurar Ecaterina,Trigano Philippe

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Toward a Web based environment for Evaluation and Design of Pedagogical Hypermedia
In order to guide and help the educational Web sites authors in the conception/evaluation process of their prototypes, it is especially interesting to propose them interactive guides. Among the existent interactive guides, only few offer a good content structure or an appropriate navigation in their system. We propose a web based system used to help teachers to design multimedia documents and to evaluate their prototypes. Our current research objectives are to create a methodology to sustain the
Author(s): Trigano Philippe,Pacurar Giacomini Ecaterina

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Une aide à la réingénierie d'un scénario pédagogique via la préconisation et la formalisation
La démarche que nous proposons dans cet article s'inscrit dans une réflexion menée autour de la réingénierie des EIAH. Elle concerne plus précisément la réingénierie d'un scénario pédagogique en assistant les concepteurs dans la phase de définition des observables qui leur permettront de comprendre a posteriori le déroulement d'une session d'apprentissage. De ce point de vue, notre démarche présente plusieurs points forts. Tout d'abord, elle permet de préconiser des observables
Author(s): Barré Vincent,Choquet Christophe

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