Proposal for validation of teaching and learning sequences: the study of a TLS of stochiometry

El objetivo de la presente investigación fue elaborar y discutir aspectos de validación de una secuencia de enseñanza y aprendizaje (SEA) sobre cálculo estequiométrico, inspirada en la metodología de investigación de la Ingeniería Didáctica. Se trata de la elaboración de un SEA por un licenciado en Química bajo la orientación del formador de docentes, a partir de los siguientes pasos: i) análisis previo; ii) elaboración del SEA sobre cálculo estequiométrico en la perspectiva CTSA; y, iii) validación a priori de SEA. En el análisis de los datos, el foco principal fue el proceso de validación a priori, utilizando un instrumento de validación basado en los estudios de Guimarães y Giordan (2013), respondido por ocho voluntarios. Los datos analizados a partir de los ítems de evaluación: estructura y organización de SEA; problematización de la SEA; contenidos y conceptos SEA; metodologías de enseñanza; la escuela y SEA y; La SEA y su relación con el Proyecto Político Pedagógico de la Escuela, ayudó a comprender y retroalimentar el material producido, así como a identificar posibles ajustes a realizar en una futura aplicación. En general, la organización de la SEA en un enfoque CTSA y el uso de la metodología de aprendizaje cooperativo Jigsaw tiene el potencial de contribuir a la educación ciudadana. Además, las discusiones apuntaron sobre la importancia del proceso de validación de las secuencias de enseñanza-aprendizaje y los pasos guiados por la Ingeniería Didáctica promueven avances tanto para la escuela, para el aprendizaje de los alumnos, como para el área de Enseñanza de la Química. The objective of the present investigation was to elaborate and discuss aspects of validation of a teaching and learning sequence (TLS) on stoichiometric calculation, inspired by the research methodology of Didactics Engineering. It is about the elaboration of an TLS by a graduate in Chemistry under the guidance of the teacher-trainer, based on the following steps: i) previous analysis; ii) elaboration of the SEA on stoichiometric calculation in the CTSA perspective; and, iii) a priori validation of SEA. In the data analysis, the main focus was the a priori validation process, using a validation instrument based on the studies by Guimarães and Giordan (2013), answered by eight volunteers. The data analyzed from the evaluation items: structure and organization of SEA; problematization of SEA; SEA content and concepts; teaching methodologies; the school and SEA and; SEA and its relationship with the school's Political Pedagogical Project, helped to understand and provide feedback on the material prepared, as well as identify possible adjustments to be made in a future application. Overall, the organization of the SEA in a CTSA approach and the use of the Jigsaw cooperative learning methodology has the potential to contribute to citizen education. In addition, the discussions pointed out about the importance of the validation process of the teaching-learning sequences and the steps guided by Didactics Engineering promotes advances both for the school, for the students' learning, and for the Chemistry Teaching area. The objective of the present investigation was to elaborate and discuss aspects of validation of a teaching and learning sequence (TLS) on stoichiometric calculation, inspired by the research methodology of Didactics Engineering. It is about the elaboration of an TLS by a graduate in Chemistry under the guidance of the teacher-trainer, based on the following steps: i) previous analysis; ii) elaboration of the SEA on stoichiometric calculation in the CTSA perspective; and, iii) a priori validation of SEA. In the data analysis, the main focus was the a priori validation process, using a validation instrument based on the studies by Guimarães and Giordan (2013), answered by eight volunteers. The data analyzed from the evaluation items: structure and organization of SEA; problematization of SEA; SEA content and concepts; teaching methodologies; the school and SEA and; SEA and its relationship with the school's Political Pedagogical Project, helped to understand and provide feedback on the material prepared, as well as identify possible adjustments to be made in a future application. Overall, the organization of the SEA in a CTSA approach and the use of the Jigsaw cooperative learning methodology has the potential to contribute to citizen education. In addition, the discussions pointed out about the importance of the validation process of the teaching-learning sequences and the steps guided by Didactics Engineering promotes advances both for the school, for the students' learning, and for the Chemistry Teaching area.