Abstract
Maybe the most difficult aspect of thinking about chemistry arises from the fact that chemistry isn’t an homogeneous subject. As a central science, it draws on a range of philosophical perspectives which in turn can result in different cognitive, learning and teaching styles in chemical education. This idea, apparently non-controversial, needs to be validated by more research. Without assuming this constitutive pluralism, describing it, and determining it, it becomes difficult to think of curricular goals and content. Thus, if we intend to improve the teaching of chemistry it is necessary, first, to assume explicitly this constitutive pluralism, then to map it in order to find the guiding principles: first for the mind (thought process), then for the curriculum and finally for the teaching, in such a way that it is as close as possible to the chemical way of operating and thinking. This is the aim of this paper. It reports the authors’ experiences in drafting structural ideas and planning for the subject “didactic of chemistry” based on the philosophy of chemistry at the University of Porto in Portugal.
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Notes
Anyway the reference curriculum we adopted and the same students related to this experience studied during the first semester of 2010–2011, in a subject called Didática da Química I, has been Salters Advanced Chemistry.
Atoms, molecules, crystals and dissipative structures. The last category includes such entities as stable flames, and periodic biochemical autocatalytic cycles. The latter are at the basis of auto-organization, a concept central to the current scientific paradigm (Earley 2004). More recently the closure of the groups that characterize Chemical entities with causal power (then ontologically fundamental) has been classified in three types named after three distinguished scientists/philosophers: De Broglie, Poincaré and Cauvin (Earley 2011).
Syntese issued a special edition on Philosophy of Chemistry in 1997 and another in 2007.
This corresponds to the most common vision of Science as a dialogue with the world. Other visions include participating in a speech community and empowerment (Anderson 2007). These visions or traditions influence the type of science education research practiced.
Praxeology is the study of the aspects of human action that can be conceived a priori.
Adúriz-Bravo (2001) defines structuring fields as the coherent sets of fundamental ideas on which the academic discipline`s identity is built.
The dimensions of chemistry thought become much more dimensions of Chemical Praxis, which are transcendental structures characterizing the chemical action or “modus operandi” in the various circumstances of chemical applications. Associated with these structures are also styles of chemical thought (apud Bensaude-Vincent 2009a), paradigms (Kuhn), research programs (Lakatos), themata (Holton) in as much as they help to define the particular chemical praxis in each instance.
Bensaude-Vincent (2009b) suggest the term “operational realism” to emphasize that chemists do not claim to represent the real structure of material substances. They rather aim at identifying specific dispositions for operations. They are interested in capacities and believe in the reality of their agencies. Operational realism is akin to Hacking’s “entity realism” but should be extended to abstract concepts such as elements as well as concrete entities.
Both ideographic, based on its history and nomothetic, based on a priori propositions confirmed by the hypothetic deductive method.
Mode 2 production of science is oriented to problem solving, and contrasts with mode 1, explanation oriented (Gibbons et al. 1994).
Hidden curriculum (Chamizo 2009).
The two great theories are the Valence Bond Theory and the Molecular Orbital Theory, with totally different bases, from which also very different concepts are derived (Costa Pereira 1995).
According to the authors, the identity axis of Chemistry would be: origins, territory conquest, a teacher’s science and the dismantling of a territory.
This name was taken from Ian Hacking (2002).
We think that the concepts of thought styles, themata, paradigm, belong to a very high inclusivity and generality level and that they are not operational from a didactic or curricular point of view, their effect not being comparable with the dimensions of thought and praxis. We believe that the latter when described, bear implicitly didactic and curricular orientations and so are more useful as foundations of Chemical Education. This does not invalidate the analysis through other concepts but we believe that our approach has the necessary elements to embrace the Chemistry “modus faciendi” and indirectly thereby its communicating and teaching.
The authors analyzed some subject matter programs of History of Chemistry, Didactics of Chemistry and in service training in chemical university courses of the main universities of Brazil and Portugal.
The Rhizomatic reasoning implies a logic that continually makes and brakes connections This is certainly not the case of chemistry which may be better described in terms of process rather than substance but follows a definite structure. The fact that chemical structures are ephemeral and that only the relationships and reactions are “real”, need not imply that it is appropriate for the pedagogy to be ‘rhizomatic’. Process structural realism (Earley 2008) is probably the best philosophy for describing the chemical phenomena.
As is the case related in this paper.
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Ribeiro, M.A.P., Pereira, D.C. Constitutive Pluralism of Chemistry: Thought Planning, Curriculum, Epistemological and Didactic Orientations. Sci & Educ 22, 1809–1837 (2013). https://doi.org/10.1007/s11191-011-9434-4
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DOI: https://doi.org/10.1007/s11191-011-9434-4