The design and development of the dragoon intelligent tutoring system for model construction: lessons learned

This paper describes Dragoon, a simple intelligent tutoring system which teaches the construction of models of dynamic systems. Modelling is one of seven practices dictated in two new sets of educational standards in the U.S.A., and Dragoon is one of the first systems for teaching model construction for dynamic systems. Dragoon can be classified as a step-based tutoring system that uses example-tracing, an explicit pedagogical policy and an open learner model. Dragoon can also be used for computer-supported collaborative learning, and provides tools for classroom orchestration. This paper describes the features, user interfaces, and architecture of Dragoon; compares and contrasts Dragoon with other intelligent tutoring systems; and presents a brief overview of formative and summative evaluations of Dragoon in both high school and college classes. Of four summative evaluations, three found that students who used Dragoon learned more about the target system than students who did equivalent work without Dragoon.     

The Information Seeking Strategies of High School Science Students

This study focused on the use of the Artemis web-based interface http://artemis.goknow.com/artemis/index.adp). This program provides a digital library for students to search, organise, and evaluation science information related to project-based investigations. The primary feature of the Artemis interface is a focused search tool. Key scaffolding features in Artemis include the collections of web sites, driving question folders, a persistent workspace for notes, cataloging of past search results, and the viewing of sites shared by other students. The primary goal of this study was to describe high school science students' use of the scaffolding features embedded in the Artemis interface. The researchers were interested in identifying the scaffolding features students use and describing how they use them in the context of finding science information related to investigations. In addition, to look at scaffolding interaction, relationships between feature use and student learning were examined. The context of this study was a four-week science investigation conducted by 43 high school biology students. Students worked in dyads to answer driving questions related to their topics of study (e.g., What do the conditions need to be in order for green algae to survive?). It was found that students relied heavily upon Organisational Feature scaffolds (persistent workspace) to help them organise information that was ultimately used by the students to produce domain specific artifacts. In addition, students spent much of their time conducting searches and saving results. However, classroom performance success was only significantly correlated with the use of Organizational Feature scaffolds – scaffolding features that students use to create driving questions, write notes about the information they found as a result of their searches, and keep track of their investigations. No other search tool used by the students possessed this important scaffolding feature. The students did not automatically use Collaborative Features – scaffolding features hypothesised to be powerful cognitive tools.     

Design,validation, and use of an evaluation instrument for monitoring systemic reform

Over the past decade, state and national policymakers have promoted systemic reform as a way to achieve high‐quality science education for all students. However, few instruments are available to measure changes in key dimensions relevant to systemic reform such as teaching practices, student attitudes, or home and peer support. Furthermore, Rasch methods of analysis are needed to permit valid comparison of different cohorts of students during different years of a reform effort. This article describes the design, development, validation, and use of an instrument that measures student attitudes and several environment dimensions (standards‐based teaching, home support, and peer support) using a three‐step process that incorporated expert opinion, factor analysis, and item response theory. The instrument was validated with over 8,000 science and mathematics students, taught by more than 1,000 teachers in over 200 schools as part of a comprehensive assessment of the effectiveness of Ohio's systemic reform initiative. When the new four‐factor, 20‐item questionnaire was used to explore the relative influence of the class, home, and peer environment on student achievement and attitudes, findings were remarkably consistent across 3 years and different units and methods of analysis. All three environments accounted for unique variance in student attitudes, but only the environment of the class accounted for unique variance in student achievement. However, the class environment (standards‐based teaching practices) was the strongest independent predictor of both achievement and attitude, and appreciable amounts of the total variance in attitudes were common to the three environments. © 2001 John Wiley & Sons, Inc. J Res Sci Teach 38: 646–662, 2001     

Some aspects of science education in Britain: a comparative study

This article gives a broad picture of science education in Britain, starting with school pupils of about 11 years of age and concluding at the Ph.D. level. In the main it considers the education system from the point of view of students preparing for professional scientific work in basic and applied research as well as those who will leave the system at first degree level for a variety of occupations, ranging from school teaching to development and marketing posts in industry. The article is not directly concerned with the education and training of engineers and technologists. The British system is compared briefly with the educational patterns of several western European countries and the USA.     

Toward a Learning Technologies knowledge network

The National Science Foundation-funded Center for Innovative Learning Technologies (CILT) is designed to be a national resource for stimulating research and development of technology-enabled solutions to critical problems in K-14 science, math, engineering and technology learning. The Center, launched at the end of 1997, is organized around four themes identified as areas where research is likely to result in major gains in teaching and learning, and sponsors research across disciplines and institutions in its four theme areas. CILT brings together experts in the fields of cognitive science, educational technologies, computer science, subject matter learning, and engineering. It engages business through an Industry Alliance Program and is also training postdoctoral students. CILT's founding organizations are SRI International's Center for Technology in Learning, University of California at Berkeley (School of Education and Department of Computer Science), Vanderbilt University's Learning Technology Center, and the Concord Consortium. Through its programs, CILT seeks to reach beyond these organizations to create a web of organizations, individuals, industries, schools, foundations, government agencies, and labs, that is devoted to the production, sharing and use of new knowledge about how learning technologies can dramatically improve the processes and outcomes of learning and teaching. This paper describes the rationale and operations of the Center, and first-year progress in defining a set of CILT partnership projects with many other institutions that came out of our national theme-team workshops. Roy Pea, of SRI International, is Director of CILT. Marcia Linn (U. California, Berkeley), John Bransford (Vanderbilt University), Barbara Means (SRI International), and Robert Tinker (Concord Consortium), serve as CILT's coprincipal investigators. Sherry Hsi (Ubiquitous Computing) and Sean Brophy (Technology and Assessment Models) are among the first group of CILT Postdoctoral Fellows. Jeremy Roschelle (SRI International) and Nancy Songer (University of Michigan) are CILT theme-team leaders. Roy Pea and Marcia Linn would like to thank the Spencer Foundation for support during their year at the Center for Advanced Study in the Behavioral Sciences, Stanford University, in which they developed the CILT concept with the other authors. CILT is funded by National Science Foundation grant #CDA-9720384. Pea and Linn would also like to acknowledge contributions to this article by the many authors of CILT partnership project proposals, and by theme-team leaders. The authors thankfully acknowledge Donna Baranski-Walker for her many contributions to developing the CILT Industrial Alliance Program while serving as its Director in 1998.     

Talking into literacy

In this article Roy Corden explores the view that the meaning of text is something readers construct by talking their way into. He illustrates some of the potential of appropriate, focused and well managed collaborative learning situations where children use their spoken language to develop literary skills and their awareness of language.     

Motivational Factors and the Visitor Experience: A Comparison of Three Sites

Museums, art galleries, botanical gardens, national parks, science centers, zoos, aquaria and historic sites are important public learning institutions. The free‐choice learning offered in these settings is closely linked to visitors' intrinsic motivation, making it important to understand the motivational factors that impact on visitors' experiences. This paper presents data from a questionnaire administered to visitors at three sites: a museum, an art gallery, and an aquarium. Similarities and differences among the sites are reported in relation to visitors' expectations, perceptions of learning opportunities, engagement in motivated learning behaviors, and perceptions of the learning experience. The importance of learning to museum visitors and the unique opportunities and challenges of the museum in relation to other educational leisure settings are discussed. The authors argue that the study of motivational factors might contribute to the development of a common theoretical foundation for interpretation in museums and other informal learning settings.     

Student Motivation and Internet Technology: Are Students Empowered to Learn Science?

The Kids as Global Scientists (KGS) project engages students in the study of atmospheric science through the use of current imagery and on‐line communication in a reform‐minded, inquiry‐based curricular program. This article presents case study data on one sixth‐grade classroom of KGS participants during the 8‐week program. Six students representing three motivation levels were selected for intensive study to help illustrate how different students view learning science and the use of technology both before and after a technology‐rich program. Pre‐ and postassessment scores were analyzed for the entire class, and the six students' comments from individual interviews served as one example of voices for each motivation group. Results indicated that students made significant gains in weather content knowledge as measured by written assessments, and interviews revealed a high level of student motivation and satisfaction with the project. We conclude with a discussion of the program characteristics we believe are important for creating a learning environment that fosters the motivation and achievement we observed. © 2000 John Wiley & Sons, Inc. J Res Sci Teach 37: 459–479, 2000.