The research in this dissertation aims to investigate the acquisition of students’ science skills in grades 5 and 6 of primary education in the Netherlands. In most primary science classes, science skills are mainly taught by way of conducting investigations. However, prior research indicates that explicit instruction and separate skills training may be more effective. In this dissertation, four studies are discussed. In the first study, an instructional framework was developed based on a categorization of science skills into thinking skills, science-specific skills and metacognitive skills. This instructional framework was used to develop lessons using systematic instruction aimed at the development of these different skills. The second study describes the development and psychometric quality of the measurement instruments in order to examine the acquisition and transfer of science skills. Two paper-and-pencil tests, three performance assessments and two questionnaires were used for this purpose. In a third study, the effects of two experimental conditions were evaluated, following an experimental pretest-posttest design: a condition with explicit instruction and a condition in which all aspects of explicit instruction were absent. Students in both conditions received an 8-week intervention and were compared to students in a baseline condition who followed their regular science curriculum. The fourth study addresses the use of performance assessments as a diagnostic tool for science teachers. In general, the results indicate that the measurement instruments can be used to reliably measure science skills. Findings also show that explicit instruction facilitates acquisition and transfer of science skills.
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How can physics education be designed and enacted in such a way that it is in agreement with the Nature of Science (NOS) and fosters conceptual understanding in electricity? The results of the studies may have implications for practice. Teachers and teacher educators need to develop a balanced perspective on conceptual understanding in relation to inquiry and take into account the tensions that were identified. For the topic of electricity, teachers may learn from the local instruction theory and pedagogy developed in this dissertation. Both teacher education institutes and professionalization efforts need to prepare teachers for this type of instruction. This will be fostered if teachers and teacher educators develop an understanding of NOS. A noticeable classroom impact of teacher learning may be expected if teachers work cooperatively on the same issue, related to a concern about student learning, if expertise is available on the content and pedagogy, and if classroom coaching and feedback are part of the project. The criteria to evaluate textbooks may be helpful for authors of learning materials if they intend to foster model-oriented activities and inquiry, but also for practitioners for the selection of these materials and in teacher education to prepare for a systematic evaluation of learning materials for physics.
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Integrated curricula seem promising for the increase of attention on science and technology in primary education. A clear picture of the advantages and disadvantages of integration efforts could help curriculum innovation. This review has focussed on integrated curricula in primary education from 1994 to 2011. The integrated curricula were categorized according to a taxonomy of integration types synthesized from the literature. The characteristics that we deemed important were related to learning outcomes and success/fail factors. A focus group was formed to facilitate the process of analysis and to test tentative conclusions. We concluded that the levels in our taxonomy were linked to (a) student knowledge and skills, the enthusiasm generated among students and teachers, and the teacher commitment that was generated; and (b) the teacher commitment needed, the duration of the innovation effort, the volume and comprehensiveness of required teacher professional development, the necessary teacher support, and the effort needed to overcome tensions with standard curricula. Almost all projects were effective in increasing the time spent on science at school. Our model resolves Czerniac’s definition problem of integrating curricula in a productive manner, and it forms a practical basis for decision-making by making clear what is needed and what output can be expected when plans are being formulated to implement integrated education.
