Teaching chromaTography in secondary school – an inVesTigaTion concerning grade, conTexT, conTenT, experimenTs and media
Journal Title: Problems of Education in the 21st Century - Year 2010, Vol 19, Issue 3
Abstract
This investigation focuses on how one of the best established and most effcient methods for the separation of substances – chromatography – is taught in secondary school. A questionnairebased study with teachers (N=76) was used to get a frst glance at the situation in schools. The results show that various chromatographic techniques (PC, TLC, GC, HPLC) are taught in secondary school using different context settings. All teachers use paperchromatography as a students‘ experiment analyzing e.g. colour pens in 7th grade. A far less amount of teachers cover more complex techniques such as gas chromatography e.g. in 12th grade. A detailed insight was attained by analyzing 37 chemistry lessons of 18 classes in 7th grade. It could be shown that a broad variety of experiments, remarkable differences in the use of scientifc concepts to explain how chromatography works and in the application of media occure.
Authors and Affiliations
Julia Lorke, Katrin Sommer
Keywords
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