| Summary: | 碩士 === 國立新竹教育大學 === 數理研究所(自然組) === 100 === This study aims to compare the effectiveness of three teaching methodologies: a hands-on activities, a computer-based activities, and a combined hands-on activities and computer-based activities on the three-grade of primary school students’ understanding of concept, alternative concepts and attitudes toward science in the domain of the changes in the three states of water. This study uses the design of quasi-experimental methods. This study that involved 149 participants assigned to three conditions and taught by two science teachers receives three instructional strategies training to teach six classes for each experimental group. The achievements test, two-tier diagnostic test on “the states of water” and ASATSCS test for students were used to collect data. Each experimental group received one of the three methods for 120 minutes a week during two weeks. In the analyses of data, ANCOVA procedures is used to determine differences in student understanding and attitudes toward their science class as a function of the three instructional strategies and the students’ answer ratio of two-tier diagnostic test is used to find out the status of conceptual understanding. The results suggest that when teaching students about the states of water, the combination of hands-on activities and computer-based activities enhanced students’ conceptual understanding and positive attitude more than the use of the hands-on activities alone.
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