Differences in African‐American and European‐American students' engagement with nanotechnology experiences: Perceptual position or assessment artifact?     

Thomas Tretter  Manuela Paechter  Dennis Kubasko  Alexandra Bokinsky  Thomas Andre  Atsuko Negishi 《科学教学研究杂志》2007,44(6):787-799

This study examined middle and high school students' perceptions of a weeklong science experience with nanotechnology and atomic force microscopy. Through an examination of student self assessments and their writing, the study allowed us to examine some of the issues that may contribute to discrepancies that are seen between European‐American and African‐American students in science. The results of the study showed that after instruction, African‐American students were significantly more likely to agree with the statement that “science involves mostly memorizing things and getting the right answer,” than European‐American students. In addition, European‐American students were significantly more likely to write their newspaper stories from a first person perspective than their African‐American peers. The results are discussed in light of the assessment task, students' interpretations of formal writing, cultural differences in the use of language in writing, and possible cultural differences in students' perceptions of the science experience. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 787–799, 2007  相似文献   

Award winners     

Kent Gustafson  Roger Wagner  Michael D. Corry  Barbara Seels  Rita Richey  John Rousell  Williams Gibbs  Danial J. Robertson  Kay Bland  David Little  Danilo M. Baylen  Abdulrahim M. Saad  Patricia Burke  Hyunjoo Kim  Linda Gilbert  Hoffman  Debra J. Dirksen  Negishi  Jason Ravistz  Vicki Napper  Danilo Baylen 《TechTrends》1996,41(3):2-3

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Conceptual boundaries and distances: Students' and experts' concepts of the scale of scientific phenomena     

Thomas R. Tretter  M. Gail Jones  Thomas Andre  Atsuko Negishi  James Minogue 《科学教学研究杂志》2006,43(3):282-319

To reduce curricular fragmentation in science education, reform recommendations include using common, unifying themes such as scaling to enhance curricular coherence. This study involved 215 participants from five groups (grades 5, 7, 9, and 12, and doctoral students), who completed written assessments and card sort tasks related to their conceptions of size and scale, and then completed individual interviews. Results triangulated from the data sources revealed the boundaries between and characteristics of scale size ranges that are well distinguished from each other for each group. Results indicate that relative size information was more readily understood than exact size, and significant size landmarks were used to anchor this relational web of scales. The nature of past experiences situated along two dimensions—from visual to kinesthetic in one dimension, and wholistic to sequential in the other—were shown to be key to scale cognition development. Commonalities and differences between the groups are highlighted and discussed. © 2006 Wiley Periodicals, Inc. J Res Sci Teach 43: 282–319, 2006  相似文献