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    Conocimiento de contenido de profesores : el experimento pensado de ca铆da libre de Galileo

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    Estudios sobre conocimiento profesional de docentes de ciencias sugieren poca integraci贸n entre las dimensiones cognitivas, did谩cticas y epistemol贸gicas que constituyen el conocimiento de contenido. El prop贸sito de este trabajo es indagar qu茅 dimensiones se pueden estudiar de manera integrada, empleando un experimento pensado como instrumento metodol贸gico. Mediante entrevista de pensar en voz alta se realiz贸 una investigaci贸n cualitativa con tres profesores de F铆sica del nivel secundario, utilizando el experimento de Galileo sobre la ca铆da de cuerpos. Encontramos que es posible estudiar las dimensiones cognitiva y epistemol贸gica. Se帽alamos algunas dificultades de los profesores con procesos para imaginar la situaci贸n y experimentar con el pensamiento. Concluimos que la falta de integraci贸n sugerida en otros estudios es de tipo metodol贸gico y no ontol贸gico.Studies on science teachers' professional knowledge suggest little or no integration between the dimensions that constitute content knowledge (e.g., cognitive, didactic, and epistemological). In this paper, we investigate which integrated dimensions we can study through a thought experiment. We carried out qualitative research with three physics secondary teachers and conducted a think-aloud interview using Galileo Galilei's free-fall thought experiment as an instrument. We find that it is possible to study the cognitive and epistemological dimensions of content knowledge. We point out some difficulties of teachers with processes to imagine the situation and experiment in thought. We conclude that the suggested lack of integration of the content knowledge dimensions in other studies is methodological and not ontological

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