| Summary: | 碩士 === 國立臺灣師範大學 === 化學學系 === 82 === (1)Doveloping STS Activity Units-fats and oils assessment strategies on STS activities "fats and oils", using problem centered, cooperative learning. In the process students (senior) are to (1) construct knowledge, beliefs, values by (a) examining their beliefs and values about responsible citizen actions concenning STS issues, (b) confronting in consistencies in their beliefs and values about STS action, and (c)promoting their open-ended thinking on the STS topic; and (2) promoting abilities in learning how to learn and absorb new knowledge. Their descriptive statement and STS maps subsequently drawn reflected their open-ended thinking on the STS topic. Their level of cognitive complexity on the STS issues were scored by the McDaniel;s 5-point scale.
The model kept them in high degree of interest throughout the process, promoting their social views and knowledge on "fats and oils" in the real life; and almost all of them advanced to higher levels of thinking and there are strong positive correlations between these assessments, expressed by percentage consistencies, between: degree of paper-pencil test and level of thinking (80%); home work and paper-pencil test (80%); level of thinking and home work (90%); and degree of paper-pencil test, home work and level of thinking (80%). The result showed that the instructional and assessment strategies were effective for students to construct knowledge, belief, and values about the STS topic.
The model was also used on a sophmore, and found effective in promoting their STS learning and pedago-gical content knowledge.
(2)Design and Databank of STS A ctivity Units "fats and oils"
This paper is to design STS activity units "fats and oils" and develop relevant databank. There are four units: (1) How to choose good cooking oil? (2)How to store cooking oil''s right? (3)How are cooking oils processed? (4) Are your cooking oils safe? Each unit can be used independently, but since they are interrelated they can be used jointly. Each unit consists of instructional goals, scenarios, vignettes, paradoxes, challenging questions, instructional and assessment strategies, and time required.
The databank was constructed with the information collected from the local libraries, newspapers, magazines, consumer association, and industry unions. Therefore, the activity units developed using the databank have the local feature suitable for use in the secondary schools. Students engaging in these activities will be able to construct the ability of investigating, decision making, and problem solving; they will also able to deelop social and global views.
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