Abstract
The present study is a cross-sectional one. The purpose of the study is through performance assessment to explore students’ cognitive development. Focusing on exploring students’ learning effects on the concept of the “law of levers”, three forms of tests were conducted, and three grades of students participated in this study. They are 37 fourth graders, 38 sixth graders, and 44 eighth graders who have different degrees of knowledge concerning the law of levers. The results reveal: 1) The fourth graders can manipulate the assessment device very well, but they are not aware of the object-relationship within the law of levers. 2) The sixth graders have a regressive performance on the C-form test. 3) The eighth graders have learned the principle of the law of levers. The instructional applications of the results are discussed in the study.
| Keywords: | cognitive development; law of levers; performance assessment; u-shaped curve |
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