The Analysis of the Teachers' and Students' Views about the Difficulties within Teaching & Learning Activity on Geology Units in Elementary School Science (초등학교 과학과 지질 단원 교수-학습 활동에서 교사와 학생이 겪는 어려움)
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- Journal of Korean Elementary Science Education
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- v.27 no.4
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- pp.420-436
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- 2008