| Summary: | 碩士 === 臺中師範學院 === 自然科學教育學系碩士班 === 92 === The purpose of this study was to find out the misconceptions about levers held by fifth and sixth graders. A semi-open-ended paper-and-pencil test was at first administered to 143 fifth and sixth graders, Fifty-eight students having representative conceptions were chosen for in-depth interview. Students'' responses were classified in order to find out the misconceptions about levers which were shared by many students, which served as the basis for designing the two-tier diagnostic instrument. The developed instrument was then administered to 870 fifth and sixth graders in Changhua and Taichung area. The results indicate that there are certain types of the misconceptions held by fifth and sixth graders about levers on moment and equilibrium, equilibrium and change, equilibrium─change─equilibrium, and arm length & weight. Students'' reasoning on numerically labeled and unlabelled levers, and on the need using the product-moment or not illustrates the diversity and the variations of their solution strategies, and how these strategies were related to differences in the task situation. Based on these findings, implications are drawn regarding the teaching, the teaching material, and the research in the future.
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