Now showing 1 - 6 of 6
  • Publication
    In Quest of productive modeling-based learning discourse in elementary school science
    (2011-10-01) ;
    Zacharia, Zacharias C.
    ;
    Constantinou, Constantinos P.
    The purpose of this study was to investigate whole classroom discourse during modeling-based learning in science, seeking to describe the discourse's characteristics, its relation to the micro-context in which it took place and to the student-constructed models, and to ascertain when it becomes productive. Additionally, we aimed to describe how whole classroom modeling discourse in science may be better supported by the teacher as well as the role of the modeling tool. In doing so, we analyzed student conversations and student-constructed models from two groups of 11- to 12-year-old students. All students used a computer programming environment, namely Stagecast Creator, as a modeling tool. Findings revealed three distinct discourse types (modeling frames): (a) (initial) phenomenological description, (b) operationalization of the physical system's story, and (c) construction of algorithms. Finally, we discuss what we consider productive modeling discourse, as well as the contributions of the software and the teacher in this respect.
  • Publication
    Objects, entities, behaviors, and interactions: A typology of student-constructed computer-based models of physical phenomena
    (2011-01-01) ;
    Zacharia, Zacharias C.
    ;
    Michael, Michalis
    ;
    Constantinou, Constantinos P.
    The purpose of this study was to develop a framework for analyzing and evaluating student-constructed models of physical phenomena and monitoring the progress of these models. Moreover, we aimed to examine whether this framework could capture differences between models created using different computer-based modeling tools; namely, computer-based programming environments which, in prior research, were found to differ in various aspects of the models constructed through them. We analyzed 220 computer-based models of physical phenomena developed by two groups of elementary-school students. Using open coding we developed a framework that includes five elements of scientific models that code for representations of: (i) the physical objects; (ii) the physical entities; (iii) the object behaviors; (iv) the interactions among physical objects, physical entities, and object behavior(s); and (v) the accuracy of the phenomenon depiction. The implementation of this framework confirmed that it can differentiate student-generated models according to their sophistication and structural components, independent of the computer-based programming environments used to create the models.
  • Publication
    ‘The exchange of ideas was mutual, I have to say’: negotiating researcher and teacher ‘roles’ in an early years educators’ professional development programme on inquiry-based mathematics and science learning
    (2015-03-15) ;
    Philippou, Stavroula
    ;
    Papademetri-Kachrimani, Chrystalla
    ;
    Philippou, Stavroula
    This paper explores the experiences of 14 early years educators who participated in a continuing professional development (CPD) programme coordinated by two of the paper’s authors. The programme was part of a three-year research project, which aimed at introducing early childhood educators to an inquiry-based approach to mathematics and science education and involved participants as teacher-researchers and curriculum-makers in cycles of action research. From this CPD experience, teachers appeared to reconceptualize traditional teacher and researcher ‘roles’ in more fluid and equitable ways, leading us to explore characteristics of the programme conducive to this shift. The main data source comprised teacher interviews, supplemented by video-recordings of group meetings, classroom enactment of activities and the facilitators’ field notes. Findings suggest that the shift was encouraged by the gradual formation of a community of practice; a reconceptualization of the ‘practical’; and the epistemology-oriented approach adopted in mathematics and science education. The discussion highlights the implications of these findings for early years educators’ professional development, and the problems of the ‘theory–practice’ divide in such development. Furthermore, the discussion stresses the importance of the socio-cultural context in which such projects take place, particularly as these often draw heavily upon international literature.
  • Publication
    Identification, Interpretation-Evaluation, Response: An alternative framework for analyzing teacher discourse in science
    (2012-08-01) ;
    Zacharia, Zacharias C.
    ;
    Tzialli, Dora
    Although research has come to recognize the importance of studying classroom-based student-teacher discourse in science, the emphasis remains largely on teachers' abilities to ask questions and provide students with feedback, or on students' abilities to ask questions or engage in argumentative discourse. Consequently, little research has focused on the discourse elements relating to teacher-student discourse interactions. In this article, we argue for a shift of research attention toward describing what the teacher is responding to (Identification of student inquiry), the process of deciding how to respond (Interpretation-Evaluation of student inquiry), and how the teacher is responding (Response to student inquiry). We propose a new methodological approach for studying teacher discourse, which involves a framework we developed while analyzing 1,385 minutes of fifth grade, whole-class science conversations covering a 2-year period and facilitated by an experienced science teacher. Then, as a case in point, we applied our framework to the teacher discourse data of the study, aiming to show that the framework can be a useful tool for examining how a teacher supports students' inquiry.
  • Publication
    Modeling-based learning in science education: Cognitive, metacognitive, social, material and epistemological contributions
    (2012-11-01) ;
    Zacharia, Zacharias C.
    Models and modeling are considered integral parts of scientific literacy, reflecting educators' efforts to introduce and engage students in authentic scientific inquiry through Modeling-based Learning (MbL) approaches in science. Over the years research has developed a considerable amount of knowledge concerning MbL. Our purpose in this paper was to review this research in order to systematize the knowledge accumulated and to provide an overview of what needs to be investigated further. We also took into account and describe the role of the teacher as part of the review. Our review shows that MbL has made cognitive, metacognitive, social, material and epistemological contributions in science education. Furthermore, it reveals that important information is still missing in order to ensure effective implementations of MbL. Future research needs to focus on investigating the learning processes which take place during MbL which result in improvements in student conceptual and epistemological understanding and abilities for scientific inquiry.
  • Publication
    Examining Learning Through Modeling in K-6 Science Education
    (2015-01-01) ;
    Zacharia, Zacharias C.
    Despite the abundance of research in Modeling-based Learning (MbL) in science education, to date there is only limited research on MbL practices among K-6 novice modelers. More specifically, there is no information on how young/novice modelers’ modeling enactments look so that researchers and educators have an idea of what should be expected from these novice/young modelers while engaged in MbL. Our purpose in this study was to investigate the ways in which K-6 novice modelers can engage in MbL in science, in rich modeling contexts, which feature various modeling media and tools. Using data from a variety of contexts, modeling means and tools and different student ages, we seek to develop, from the ground up, detailed descriptions of the modeling practices that K-6 students follow when involved in MbL. While using the modeling phases (e.g., construction of a model, evaluation of a model), along with their associated practices, as described in the literature for older learners and expert modelers as our basis, we followed ground research approaches to develop the descriptions of student-centered MbL. Our findings revealed that novice modelers enact certain MbL phases in a different manner than those described in the literature for older learners and/or expert modelers. We found that not only do the content and context of the various modeling phases differ, but also the sequence of these modeling phases and their associated practices, are different from those already described in the literature. Finally, we discuss how rich descriptions of MbL discourse can ultimately inform teachers and researchers about ways in which learning in science through MbL can be supported.
    Scopus© Citations 40