مهشید ترکمان اسدی

Abstract The subject of this dissertation is the design and evaluation of a combined model of educational content knowledge with psychological experience, which is designed for student-teachers in the field of chemistry education. This research aims to provide the indicators necessary to improve the teaching process in chemistry content through the exploration of the dimensions of teaching based on the knowledge of educational content in the topic of subatomic particles in the ۱۰th year high school chemistry book. Also, on the other hand, to examine the effect of the teacher's mastery over these dimensions on his psychological experience. The purpose of this research is to show how by discovering the dimensions of teaching the topic of subatomic particles in the tenth grade chemistry course, it is possible to identify the factors that make up the psychological experience of drowning for the teacher while teaching this topic and to show the type of relationship between them in a model. . The importance of this research is that the presentation of a combined model of content knowledge with psychological experience, which is designed for student-teachers in the field of chemistry education, can improve the dimensions of teaching based on the educational content knowledge raised in the topic of subatomic particles in the ۱۰th year high school chemistry book. Review and provide indicators necessary to improve the teaching process in chemistry content. This research also investigates the effect of the teacher's mastery of these dimensions on his psychological experience and through identifying the factors that make up the psychological experience of the teacher's drowning, when teaching this topic, and showing the type of their relationships in a model as a key mechanism for improving the quality of the teacher's psychological experience. to display In this way, it can help to improve the teaching and learning process. This research used a mixed design in a sequential manner. Therefore, in those stages the study was done in a chronological order. In such a way that a stage derives from the previous stage or follows from it. The research procedures in one stage depend on the previous stage and proceed based on the research objectives. These procedures are carried out in the form of three main steps as follows. The first step aims to determine the dimensions of educational content knowledge in teaching the subject of subatomic particles in chemistry class, ۱۰th grade; The second step aims to determine the factors that make up the psychological experience of drowning based on the PCK dimensions of teaching the subject of subatomic particles in the chemistry course, tenth grade; And the third step was taken with the aim of identifying the representative model of the relationship between the dimensions of teaching based on PCK and psychological experience in teaching the topic of atom in chemistry course. In the first step, the Delphi research method was used, the participants were expert chemistry teachers with more than ۵ years of teaching experience, who were selected by theoretical sampling and then snowball. ۳۳ participants were present in this step. In the first round, the interview tool was used. After the implementation of the interviews, the process of coding and categorization was done. Then, based on that, the goal-content table was designed and the basis for writing the questionnaire. This questionnaire was implemented in two rounds. The obtained results were analyzed through Q factor analysis. The achievement of this step includes the dimensions of educational content knowledge in teaching the subject of subatomic particles as follows: "Teacher's representations"; "report and test-oriented learning activities"; "Learning leadership"; "Interactive strategies in teaching"; "The origin of misunderstandings of subatomic particles"; "Misunderstandings of the nature and stability of subatomic particles"; "Fixing misunderstandings of subatomic particles" and "Chemical concept and symbol of atoms". In the second step of the dissertation, a survey research method was used. The researched population in this step were the student-teachers of the field of chemistry education in the universities of Farhangian and Tarbiat, the secretary of Shahid and new teachers, who were selected by random cluster sampling. The questionnaire "teaching skills of the subject of subatomic particles in the ۱۰th grade chemistry course, based on the PCK concept" and the "work-related fascination" questionnaire were implemented among ۲۸۴ people as a research sample. The resulting data were analyzed using exploratory factor analysis in R method. The achievement of the second step includes the factors that make up the teacher's psychological experience based on PCK dimensions as follows: "teaching passion"; "Presence in teaching"; "Drowning in teaching"; "Mental map of teaching"; "Learning leadership"; "Representation" and "teaching feedba