초등학생들의 과학 ‘측정’ 활동에 나타난 불확실성 원인과 감소 행동 분석

Abstract

This study aimed to analyze types of uncertainty appearing in elementary school students’ measurement activities and their uncertainty reduction behaviors. There were six types of uncertainty causes appearing in elementary school students’ measurement activities, ‘Measurement Tool’, ‘Measurement Subject’, ‘Measurement Process’, ‘Operator’s Skill’, ‘Sample-related Problem’ and ‘Environment’. As for ‘Measurement Subject’, there were many cases that elementary school students came to be uncertain about their measurement values, especially when measurement subjects were organisms moving or irregular in shape. Their uncertainty reduction behaviors in measurement activities can be divided into 6 different types, ‘developing measurement tools’, ‘clarifying the measurement area by the movement and shape of measurement subjects’, ‘designing and preparation in advance of measurement’, ‘learning to use measurement tools’, ‘selecting samples’ and ‘creating an environment’. Out of these types, ‘clarifying the measurement area by the movement and shape of measurement subjects’ was the most uncertainty reduction behavior in frequency. When analyzing relations between uncertainty causes and uncertainty reduction behaviors, this study found out that some learned to use measurement tools or even developed measurement tools in the aspect of measurement tool-related causes, while others solved uncertainty by clarifying the measurement area and measuring multiple subjects or the entire group in the aspect of measurement subject-related causes.