Relaciones explicativas entre los niveles de representación macroscópico, microscópico y simbólico de la materia; una propuesta didáctica para la enseñanza del concepto de “reacción química”
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La enseñanza y aprendizaje de los conceptos químicos ha sido de vital importancia para la didáctica de las ciencias y muy particularmente para la didáctica de la química. El presente estudio se llevó a cabo con estudiantes del décimo de educación media del Colegio Campestre El Remanso, ubicado en Sabaneta (Ant.), con los cuales se desarrolló un proyecto de clase, que contenía una secuencia didáctica que, entre sus diversas actividades, contenía cinco instrumentos diseñados específicamente para la recolección de información. El propósito principal de este trabajo era posibilitar en los estudiantes, el establecimiento de relaciones explicativas entre los tres niveles de representación de la química. Se encontró que los estudiantes presentan dificultades de tipo conceptual en cuanto al uso y manejo adecuado de algunos conceptos básicos de la química, dificultades y confusiones en el manejo de la simbología y nomenclatura química; así como la poca consciencia del mundo microscópico que presentan los estudiantes.
Abstract: The teaching and learning of the chemical concepts has been of vital importance for the didactics of the sciences and very particularly for the didactics of the chemistry. The present study was carried out with students of the tenth high school of the Colegio Campestre El Remanso, located in Sabaneta (Ant.), with which a class project was developed, which contained a didactic sequence, which among its various activities, contained five instruments designed specifically for the collection of information. The main purpose of this work was to enable students to establish explanatory relations between the three levels of representation of chemistry. It was found that students present conceptual difficulties regarding the use and proper management of some basic concepts of chemistry, difficulties and confusions in the management of symbology and chemical nomenclature; as well as the lack of awareness of the microscopic world presented by students.
Abstract: The teaching and learning of the chemical concepts has been of vital importance for the didactics of the sciences and very particularly for the didactics of the chemistry. The present study was carried out with students of the tenth high school of the Colegio Campestre El Remanso, located in Sabaneta (Ant.), with which a class project was developed, which contained a didactic sequence, which among its various activities, contained five instruments designed specifically for the collection of information. The main purpose of this work was to enable students to establish explanatory relations between the three levels of representation of chemistry. It was found that students present conceptual difficulties regarding the use and proper management of some basic concepts of chemistry, difficulties and confusions in the management of symbology and chemical nomenclature; as well as the lack of awareness of the microscopic world presented by students.