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KMID : 1059520200640050267
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Journal of the Korean Chemical Society
2020 Volume.64 No. 5 p.267 ~ p.276
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Analysis of Chemistry Teachers' Cognitive level related to Two Types of Acid-Base Models based on Epistemological and Ontological viewpoint
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Lyu Eun-Ju
Paik Seoung-Hey
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Abstract
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This study analyzed the level of chemistry teachers' cognition related to two types of acid-base models taught in secondary schools. For the purpose, a questionnaire was developed to identify teachers' cognitions based on previous studies that analyzed the ‘Ignorance’ of each model. The questionnaire consisted of two items, one related to acid and base reactions and one related to acid and base dissociation, which suggested inconsistencies between the two models. The subjects were 15 chemistry teachers, and as a result, teachers' cognitions were analyzed at four levels. The four levels are: if they don't know the two models, if they only understand one model, if they understand the two models, and perceived the ‘Ignorance’ of one model, and if they understand the two models and perceived the ‘Ignorance’ of the two models. The largest proportion of teachers understood the two models and perceived the ‘Ignorance’ of one model. However, the proportion of understanding the two models and perceiving the ‘Ignorance’ of the two models was very small. Through this, we argued that efforts to increase the level of chemistry teachers' cognition of the model and ‘Ignorance’ were necessary.
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KEYWORD
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acid-base models, chemistry teacher, Ignorance, cognitions related to model
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