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Assessing the Life Science Knowledge of Students and Teachers Represented by the K–8 National Science Standards

机译:评估以K–8国家科学标准为代表的学生和教师的生命科学知识

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摘要

We report on the development of an item test bank and associated instruments based on the National Research Council (NRC) K–8 life sciences content standards. Utilizing hundreds of studies in the science education research literature on student misconceptions, we constructed 476 unique multiple-choice items that measure the degree to which test takers hold either a misconception or an accepted scientific view. Tested nationally with 30,594 students, following their study of life science, and their 353 teachers, these items reveal a range of interesting results, particularly student difficulties in mastering the NRC standards. Teachers also answered test items and demonstrated a high level of subject matter knowledge reflecting the standards of the grade level at which they teach, but exhibiting few misconceptions of their own. In addition, teachers predicted the difficulty of each item for their students and which of the wrong answers would be the most popular. Teachers were found to generally overestimate their own students’ performance and to have a high level of awareness of the particular misconceptions that their students hold on the K–4 standards, but a low level of awareness of misconceptions related to the 5–8 standards.
机译:我们根据国家研究委员会(NRC)K-8生命科学内容标准报告了项目测试库和相关仪器的开发情况。利用科学教育研究文献中有关学生误解的数百项研究,我们构建了476个独特的多项选择题,用于衡量应试者对误解或接受的科学观点的程度。在对30,594名学生进行了全国性测试之后,他们对生命科学进行了研究,并向353名教师进行了测试,这些项目揭示了一系列有趣的结果,尤其是学生在掌握NRC标准方面遇到的困难。教师还回答了测试项目,并展示了高水平的主题知识,反映出他们所教的年级水平的标准,但对自己的误解很少。此外,教师还为学生预测了每个项目的难度,并且哪个错误答案最受欢迎。人们发现,教师通常会高估自己的学生的表现,并对学生对K–4标准的特定误解有较高的认识,而对与5–8标准有关的误解的认识却较低。

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