Abstract
This study presents a series of three experiments that focus on how distributed scaffolding influences learners’ conceptual understanding and reasoning from combined levels of triangulation, at the interactive level (discourses within a focus group) and the collective level (class). Three inquiry lessons on plate tectonics (LPT) were designed, implemented and redesigned to explore how students responded to the scaffoldings provided. The results show that the goal-oriented version (LPT3) was significantly more effective at helping students develop an understanding of plate tectonics and evidence-based reasoning than the teacher-led (LPT1) and deconstructed (LPT2) versions (χ 2 = 11.56, p < 0.003). In LPT3, we can identify three key features of the scaffolding: an advanced organizer, deconstruction of complex tasks, and reflection on the whole inquiry cycle at the end of class time. In addition, LPT3 took much less teaching time. In other words, it appears to be effective and efficient, most likely due to synergies between teacher facilitation and lesson scaffolds. The empirical results clarify the functions of the design model proposed for distributed scaffolding: navigating inquiry, structuring tasks, supporting communication, and fostering reflection. Future studies should more closely evaluate the scaffolding system as a whole and synergies between different types of scaffolds for advancing learning.
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Acknowledgments
This study is based on the work supported by the Ministry of Science and Technology, Taiwan, R.O.C. under Grant No. NSC 98-2511-S-003-055 and by the Aim for the Top University Project at the National Taiwan Normal University. The authors gratefully acknowledge the assistance of Prof. Larry Dean Yore and his wife, Sharyl Yore.
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Appendices
Appendix 1
Appendix 2
Sample questions in the three versions of LPT
A. Sample questions in LPT1 and LPT2
B. Advanced organizer and sample questions in LPT3
Appendix 3
Types of supports from distributed scaffolding and student performances in LPT1 and LPT2
Appendix 3 (continued)
Actual supports from distributed scaffolding in LPT1 and LPT2 over time
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Hsu, YS., Lai, TL. & Hsu, WH. A Design Model of Distributed Scaffolding for Inquiry-Based Learning. Res Sci Educ 45, 241–273 (2015). https://doi.org/10.1007/s11165-014-9421-2
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DOI: https://doi.org/10.1007/s11165-014-9421-2