國中“細胞課程”概念改變教學之發展研究

A Study of Conceptual Change Teaching Activities for the Lesson of Cell Curriculum in Junior High School

盧秀琴(Chow-Chin Lu) ； 黃麗燕(Li-Yen Huang)

《科學教育學刊》 15卷3期 (2007/06) Pp. 295-316

https://doi.org/10.6173/CJSE.2007.1503.05

摘要

本研究先分析國中生學習完「細胞課程」後具有的另有概念類型，然後以概念改變模式為依據，使用5E學習環教學策略，搭配類比教學、概念構圖和實驗等設計「細胞課程」的概念改變教學活動。本研究採用準實驗研究，以班級教學方式進行實驗。研究結果發現使用概念改變教學的實驗組學生比控制組學生獲得較多的科學概念，達到顯著差異；實驗組學生在TIWM、CCAT得分進步超過對照組學生0.51和0.39個標準差的實驗效果量；且概念改變教學設計對於中、低分群學生具有顯著的效果。以「葉子的層次」為例詮釋本體類別內的概念改變教學成效，發現以觀察榕樹葉橫切面標本做放聲思考討論和概念構圖，確實可使學生產生認知結構的衝突，進而幫助他們釐清概念；而「細胞的生理現象」屬於本體類別間的概念改變，雖然教師使用5E學習環教學，學生只認識表象的細胞擴散與滲透，無法說明真正原因。由於部分生物教師以講述法在教「細胞課程」，建議教師在教學前或進行補救教學時，可參考本研究的概念改變教學設計，如：細胞構造與功能的類比教學、葉子組成層次的概念構圖等，選擇性的加入自己的教學；對於較難的「細胞的生理現象」，則建議放在國二的溶液、濃度和滲透壓等化學課程一起做教學。

關鍵字

5E學習環教學策略 ； 細胞課程 ； 概念改變教學

並列摘要

To develop the conceptual change teaching activities, firstly, this study analyzed the types of alternative conceptions of the lesson of cell, and then applied the following teaching strategies to curriculum design, the conceptual change model, the 5E constructive learning cycle, matches analogy teaching, concept mapping and laboratory experiment. The quasi-experimental method was employed in this study to explore the effect of curriculum design. The results uncovered that the conceptions of experimental group students were better than that of the control group students, and furthermore it revealed the significant difference between these two groups. The conceptual change teaching activities could apparently promote the experimental group students' learning outcome, and the scores of TIWM and CCAT in the middle and low score-group of experimental group were higher by 0.51 SD and 0.39 SD, especially. For example, in the lesson of ”leaf's level”, to de-monstrate the effect of teaching activities, students actively engaged their learning on observing the cross section specimen of the banyan tree leaf, to think and to discuss together, then followed by mapping conception, and the activities were truly caused students' cognitive conflict, and resulting in the conceptual clarification on their confused conceptions. However, the learning outcome of 5E constructive learning activities for the difficult concepts and those concepts involving the cross ontological conceptual change, such as the concepts of ”the physiological phenomenon of cell membrane”, was limited on the explicit representation of osmosis only, not on the abstract and the real principle. This study proposed the following suggestions. Regarding the conducive effects of the teaching activities in this study, the teaching methods used by case teacher's explanation could be served as the base of curriculum design, for example, the analogy teaching for the cell structure and function, and the concept mapping in the leaf composition and so on. For the more difficult and abstract concepts, such as ”physiological phenomenon of the cell membrane”, this study suggested the way of setting these concepts into the chemistry lessons together, density and osmotic pressure.

並列關鍵字

5E Constructive Learning Cycle ； Cell Lesson ； Conceptual Change Teaching Activities

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