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In the Laboratory
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Bridging the Gap: From Traditional Silk Dyeing Chemistry to a Secondary-School Chemistry Project
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M. Fátima Paixão
Escola Superior de Educação, Instituto Politécnico de Castelo Branco, Rua Faria Vasconcelos, 6000-266 Castelo Branco, Portugal
Mariette M. Pereira
Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
António F. Cachapuz
Departamento de Didáctica e Tecnologia Educativa, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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October 2006
Vol. 83 No. 10
p. 1546
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| Abstract |
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This article reports the implementation of a project involving Portuguese secondary-school chemistry teachers and their students. It explores formal and informal learning contexts integrating silk dye chemistry with historical and artistic heritages in an attempt to make chemistry more meaningful. The three different phases of the project are described. The first phase, the contextualization, involves a visit to a thematic museum and the searching and picking of natural dyeing species that are to be used in the second phase. The second phase is experimental. It involves the extraction of natural dyes, selected examples of synthesis, and mordant and dyeing activities. In the third phase several activities to promote a relationship between the secondary school and its local community and to develope and enlarge the chemistry learning contexts (STS interrelations) are carried out. Both the teachers and the students found the project interesting, pointing out that it went far beyond the academic dimension of chemistry.
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| Supplement |
Selected examples of the experimental protocols are available.
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| More Information |
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Citation |
Paixão, M. Fátima; Pereira, Mariette M.; Cachapuz, António F. J. Chem. Educ. 2006 83 1546.
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Keywords |
Dyes / Pigments; Hands-On Learning / Manipulatives; High School / Introductory Chemistry; Industrial Chemistry; Interdisciplinary / Multidisciplinary; Laboratory Instruction; Multimedia-Based Learning; Natural Products; Nonmajor Courses; Organic Chemistry; UV-Vis Spectroscopy
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History |
Created:
Last Updated: |
8/23/2006
8/28/2006
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 Caution! | | Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations. |
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