Cakrawala Pendidikan Jurnal Ilmiah Pendidikan Vol. 44 No. June 2025, pp. https://journal. id/index. php/cp/issue/view/2904 DOI: https://doi. org/10. 21831/cp. Enhancing pedagogical content knowledge of preservice science teacher students through the inquiry reflective teaching model Susilowati1*. Suciati1. Sulistyo Saputro2 . Muzzazinah2 Universitas Negeri Yogyakarta. Indonesia Universitas Sebelas Maret. Indonesia *Corresponding Author: susilowati@uny. ABSTRACT Reflecting the substance of the Preservice science teachers must have the ability to teach science This ability is related to pedagogical and content knowledge. Teaching with inquiry is important in the development process of teacher professionalism. This is an urgency for preservice science teacher students to be equipped with teaching skills inquiry and the ability to reflect in learning. This research aimed to analyze the validity and practicality of the developed Inquiry Reflective Teaching (IRT) and to find the effectiveness of the IRT model in improving PCK. This study used the Research and Development (R&D) method. The data collection techniques used were IRT model assessment, practicality questionnaire, and Pedagogical Content Knowledge test. The data were analyzed using quantitative and qualitative analysis techniques. Quantitative data analysis techniques were used to determine the validity and practicality categories of the IRT model. Qualitative data analysis techniques were utilized to analyze data in the form of suggestions from experts, practitioner lecturers, and preservice science teacher students. The results of this study showed that the validity assessment was in a Aovery validAo category. Likewise, the results of the assessment of the practicality of the IRT model were categorized as Aovery practicalAo. The IRT model can effectively improve the PCK of preservice science teachers. Keywords: preservice science teacher, pedagogical content knowledge, inquiry reflective teaching model Article history Received: 4 October 2024 Revised: 7 March 2025 Accepted: 5 April 2025 Published: 24 June 2025 Citation (APA Styl. : Susilowati. Suciati. Saputro. , & Muzzazinah. Enhancing pedagogical content knowledge of preservice science teacher students through the inquiry reflective teaching model. Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan, 44. , 358-377 DOI: https://doi. org/10. 21831/cp. INTRODUCTION Global challenges such as climate change, environmental crises, energy crises, and population explosions necessitate a learning approach that integrates science and technology to address these issues (Kelley & Knowles, 2. Science teachers have a central role that needs to be considered (La Velle, 2. The development of holistic science knowledge becomes a matter of substance, considering integration of science material contains aspects not only of science content . hysics, chemistry, and biolog. but also its relationships with technology and design or engineering, which illustrates basic knowledge to solve problems that arise in society. In this case, a science teacher needs to be able to present a problem that arises in the community in the classroom and invite students to understand the integrity of the material in the problem, which is a step in solving the problem. These abilities are related to pedagogical and teacher-professional In essence, preservice science teachers must have the ability to teach science appropriately. Science teachers must master the content being taught and how to teach it. This ability is related to pedagogical and content knowledge, which is referred to as Pedagogical Content Knowledge (PCK). PCK mastery for preservice science teachers becomes urgent based on the results of research to become an effective science teacher. Teachers must be confident in both science Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. content knowledge of various disciplines . hysics, life science, earth, and spac. , and PCK. Professional development activity should use a constructivist approach, in which teachers build their knowledge through their experiences. Integrated science learning reflects the vision and ideas of reform and innovative pedagogy. An interdisciplinary science teacher preparation program is needed. It is confirmed that the transformation of the science curriculum emphasizes science as a whole rather than separate sciences, including biology, chemistry, and physics (Bell & Gilbert, 1. Efforts to reform science learning can be carried out by adopting Next Generation Science Standards (NGSS) (Thompson & Emmer, 2019. Christian et al. , 2. The integrative nature of the NGSS presents unique challenges for science teachers. One of the main goals of the NGSS is the integration of engineering practice with science content cohesive within subjects (NGSS, 2. The Indonesian science curriculum in the 2013 Curriculum has focused on the achievement of integrated scientific knowledge. However, not all competencies are achieved by students in the Moreover, in the learning practices, integrated science learning has not appeared yet. Teachers experience difficulties teaching science in an integrated manner due to partial education . hemistry, biology, physic. This is confirmed by the results of previous research that science teachers in junior high schools still lack teaching science in an integrated manner and direction on constructivist meaningful learning (Susilowati, 2. Teaching with inquiry is important in the development process of teachersAo In general, teaching scientific inquiry is a challenge for pre-service science teachers (Loughran, 2014. Schneider & Plasman, 2. One obstacle in learning planning about scientific investigations is inadequate content knowledge. There is still little research done to analyze the difficulties faced by aspiring pre-service teachers and beginner science teachers that emerge during learning planning and difficulties in putting it into practice (Barendsen & Henze. Ruys et al. , 2. Several studies show that reflection in general is an effective learning method to foster the development of pedagogical content knowledge of teachers (Aydin Ayhan, 2013. Capps & Crawford, 2013. Evens et al. , 2. From the perspective of learning theory, learning planning is imperative in teacher education (Stender et al. , 2. Based on previous research, the results of self-reflection carried out by science teachers showed that things that are the focus of teacher attention are generally on technical learning activities, student behavior, media, and dynamics of learning activities. Teachers have not reflected regularly, comprehensively, and in-depth on matters relating to the teaching profession as a teacher, and other supporting matters related to improving the quality of activities learning, for example by reflecting on whether a learning method is good or not or reflecting on essential . concepts from the subject matter (Nugraha et al. , 2. Teachers generally face difficulty dealing with when carrying out in-depth reflection because teachers have insufficient knowledge regarding the components that should be reflected and how exactly the reflection process itself is carried out. The research examines reflection after the teaching process is carried out . etrospective reflectio. Little research has been carried out in reflection exploration before the teaching process . nticipative reflectio. In general, reflection can be done before, during, and after the teaching process. Preservice science teacher students need to be prepared to have the ability to teach. However, preservice science teacher students do not yet have the skills and experience in the practice of science To teach certain science content, content-specific pedagogic knowledge is needed. Thinking about how to prepare for teaching, anticipatory reflection is considered a core step in developing and improving the teaching competence of preservice teachers (Loughran & Hamilton, 2. That matters because anticipatory reflection is an indispensable prerequisite for the automatic formation of action scripts that experienced teachers rely on in their teaching (Stender et al. , 2. This is an urgency for preservice science teacher students to be equipped with inquiry teaching skills and the ability to reflect on learning. This is in accordance with the nature of science that inquiry is a learning model that animates science teaching. To teach with the inquiry learning model, the teacher's ability in integrated pedagogy of PCK is needed. inquiry-based integrated science teaching model is needed to carry out a reflective stage to facilitate the development of PCK for preservice science teacher students. This research focuses Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. on validation, the practicality of the IRT model, and the effectiveness of the IRT model. The validity of the IRT model is reviewed from expert assessment. Meanwhile, the practicality of the IRT model is reviewed from the assessments of practitioner lecturers and preservice science teacher students. This research aims to produce an IRT model in teaching for preservice science teacher students. The research questions were formulated as follows: . What is the validity of the Inquiry Reflective Teaching (IRT) model to enhance Pedagogical Content Knowledge (PCK) of preservice science teacher students on the topic of environmentally friendly technology? . What is the practicality of the Inquiry Reflective Teaching (IRT) model to enhance Pedagogical Content Knowledge (PCK) of preservice science teacher-students on the topic of environmentally friendly technology? . How is the effectiveness of the Inquiry Reflective Teaching (IRT) model in enhancing Pedagogical Content Knowledge (PCK) of preservice science teacher students on the topic of environmentally friendly technology? METHOD This research used the Research and Development (R&D) method of the Borg and Gall model . The research was carried out via several steps, i. , research and information collecting, planning, developing a preliminary form of the product, preliminary field testing, main product revision, main field testing, operational product revision, operational field testing, final product revision, dissemination, and implementation. The IRT model development stage includes ten steps, where these steps are divided into four main steps, namely define, design, development, and dissemination. This research was limited to the IRT model design stage up to the main scale test of one class. The design of the IRT model is presented in Figure 1. The first stage that has been carried out is conducting research and collecting information. The initial research was conducted by involving 30 preservice science teacher students as Data collection from students included data on the ability to design investigations, the ability to link integrated science concepts, and the ability to plan learning. Initial research was carried out to analyze the issue of content pedagogic capabilities in learning planning. Information was collected to examine the components of the inquiry model, reflective components, and PCK In the planning stage, the PCK indicators and components were formulated. The PCK indicator was used to plot grids and instruments. The components of the inquiry and reflective model were detailed to prepare a draft model to be developed. The components of the inquiry model were detailed into a theoretical framework, syntax, learning environment, and learning The next step was to design an IRT model and its supports, including lecture plans, teaching materials, and student worksheets. The products that have been developed were then validated and carried out by a Focus Group Discussion (FGD). The product was validated by seven experts in the field of science learning. Experts assessed the feasibility of the products. The FGD was carried out to provide suggestions and responses for product improvement. In the preliminary field-testing stage, the IRT model was assessed for its practicality by five lecturers and five science education students. After the revision . ain product revisio. was carried out based on the results of preliminary field testing, the next step was main field testing. The IRT model was tested through the main field-testing stage. The IRT model testing was carried out on the School Science Study i course, which includes Environmentally Friendly Technology material. This material was chosen because, in addition to being interesting, it also has urgency for preservice science teacher students to master. Limited testing was carried out involving 10 teacher students in semester V of the 2021/2022 Academic Year in August 2023. The testing was carried out to determine the implementation of the IRT model and the effectiveness of the IRT model in improving PCK. The research design used the Pre-Experiment: One-Group Pretest-Postest Design in main field testing and the Nonequivalent Control Group Pretest-posttest Design in operational field testing. The test subjects were given learning using the IRT model. Before learning, a pretest was conducted to determine the initial PCK and a posttest to determine the PCK after learning using the IRT model. Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. Figure 1. Research procedure The research instruments used were an assessment sheet for the IRT model, a practicality assessment sheet for the model, a practicality questionnaire, and PCK test questions. The model assessment instruments were used by experts to validate the IRT model. The IRT model assessment components included the appropriateness of content, presentation, and language. Furthermore, the content appropriateness components were further divided into model components of theoretical basis, syntax, teacher and student behavior, class structure, learning environment, and class management. The practicality instruments were used by science education lecturers to assess the practicality of the model. Components in the practicality instrument of the IRT model consisted of the implementation of the IRT model syntax, including orientation, conceptualization, investigation, conclusion, discussion, problem suggestion, hypothesis, reasoning, and testing. Meanwhile, students filled out the questionnaire to provide feedback on the practicality of the IRT model that had been developed. The components of the IRT model practicality questionnaire for preservice science teacher students included aspects of ease of syntax and instructions in the IRT model . tudent activity shee. The PCK test instrument is used to obtain PCK ability data before and after using the IRT model. In addition, the PCK test instrument is used to obtain PCK ability data in classes that use the IRT model and classes that do not use the usual model, namely inquiry. The data analysis technique was carried out descriptively, quantitatively, and qualitatively. Quantitative descriptive analysis was used to analyze the data into descriptive parameters up to the product eligibility criteria. Qualitative data analysis was carried out to analyze data in the form of descriptions from validators regarding product improvement suggestions. Quantitative analysis uses prerequisite tests and hypothesis tests. The prerequisite tests used are normality and homogeneity tests. The difference tests used are the paired sample t-test and the independent sample t-test. Independent sample t-test analysis uses the Mann-Whitney test. FINDINGS AND DISCUSSION Findings Define stage At the define stage, initial research is carried out and information is collected regarding the abilities of preservice science teacher students in designing investigations. Data were obtained from an assessment of the investigation design. The data on the ability to design investigations illustrates the scientific method ability of preservice science teacher students. The data on the Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. ability to design investigations were obtained through the assessment of the experimental design of preservice science teacher students in Semester V in the School Science Study i course at Universitas Negeri Yogyakarta. Furthermore, the analysis data on the ability to design investigations are presented in Table 1. Table 1. Results of analysis of the ability of preservice science teacher students in designing Aspects of Designing Investigations Formulating the problem Defining variables Determining tools and materials Developing investigative steps Compiling a table of observation results Percentage (%) Based on Table 1, the data shows the ability to design investigations in the aspects of formulating problems is 52. 5%, defining variables is 51. 25%, determining tools and materials is 75%, compiling investigation steps is 75%, and compiling observation result tables is 65%. Based on the data, the ability to design investigations is still the lowest in the aspect of defining variables, and the highest is in the aspect of determining tools and materials. Meanwhile, the aspects of formulating problems, compiling investigation steps, and compiling observation results also show that they are still quite lacking. Furthermore, the final semester exam score data that depict the mastery of concepts of preservice science teacher students in the School Science Study i course at the Universitas Negeri Yogyakarta Science Education Study Program is presented in Figure 2. Figure 2. Results of analysis of the ability of preservice science teacher students in linking integrated science concepts Based on Figure 2 shows the results of the ability of preservice science teacher students in linking integrated science concepts, including 4. 88% in the very good category. 39% in the good category. 15% in the moderate category, 24. 39% in the less category, and 12. 20% in the very less category. It can be concluded that students tend to have difficulty linking one concept with the integrated science concept. In the ability of preservice science teacher students in learning planning, the ability of each aspect of learning planning is presented in Table 2. Table 2. Results of analysis of the ability of preservice science teachers in learning planning (RPP) Aspect Percentage (%) Formulate indicators Determine integration material Determine model, approach, method Determine media Arranging learning activities Determine the type of assessment Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. Based on Table 2, the percentage of each aspect of science learning planning is still low, namely formulating indicators at 35. formulating integration materials at 25. determining models, approaches, and methods at 46. determining media of 15. compiling learning activities of 20. and determining the type of assessment of 20. can be concluded that the aspects of learning planning that are still lacking are determining media, compiling learning activities, determining the type of assessment, and determining integration In addition, the ability to formulate indicators and determine models, approaches, and methods is also still lacking. Figure 2. The IRT model design framework Planning stage After conducting a preliminary study, the next stage is the planning stage. The stages carried out in planning include: a. Formulate PCK indicators to plan grids and instruments. PCK components include Knowledge of Science Curriculum (KSC). Knowledge and beliefs about Students' Understanding of specific science topics (KSU). Knowledge and beliefs about assessment in science. Knowledge and beliefs about Instructional Strategies for teaching science (KIS). Combining the inquiry model and the reflective approach to produce a draft of the IRT The IRT model is a teaching or lecture model based on the inquiry teaching model integrated with reflective thinking in science learning planning. The inquiry teaching model includes orientations, conceptualization, investigation, conclusion, and discussion. The reflective process includes suggestions, problems, hypotheses, reasoning, and testing (Joyce et al. , 2009. Pedaste et al. , 2015. Loughran & Hamilton, 2. Detailing the components of the IRT model into a theoretical framework, syntax, learning environment, and learning impact. Formulating the components of the developed learning model product in the form of RPS (Semester Learning Pla. , model implementation guidebook, and Student Activity Sheet (LKM). The IRT model design framework is depicted in Figure 2. Design stage Develop a preliminary form of the product The Develop Preliminary Form of Product stage includes the preparation of the product draft. FGD (Focus Group Discussio. , and validation of the IRT model draft. At this stage, the IRT model design is carried out, which includes: . Model book design. Design of teaching materials and Student Activity Sheets. Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. ExpertAos validation The IRT model product was validated by seven experts in science learning, science learning evaluation. PCK, and environmentally friendly technology materials. In addition to expert validation. FGD (Focus Group Discussio. was also conducted. FGD aims to obtain input and suggestions in depth regarding the contents of the developed model and then as revision material. In the validation process, an FGD is carried out and suggestions for improvements are obtained from experts, which are presented in Table 3. The results of the expert assessment analyzed by Aiken's validity are presented in Table 4. Table 3. Results of the FGD (Focus Group Discussio. Experts Professor 1 Professor 2 Professor 3 Professor 4 Professor 5 Doctor 1 Doctor 2 Suggestion Emphasize the scientific attitude dimensions of science and investigative skills. Need to clarify the syntax of the findings. Clarify how to reflect on learning from videos. Clarify the integration of the developed models Video selection for triggering reflection should be considered. It is necessary to choose videos whose learning content is not good so that it has the potential to give rise to many The student worksheet orientation needed to be provided, so that students have critical discussions . ros and con. regarding CO2. It is necessary to pay attention to how to apply the right strategy according to the topic. Table 4. The Aiken's V for each component of the IRT model Components of the IRT Model Manual Introduction Theoretical foundation Syntax Social system Presentation AikenAos V Validity Valid Valid Valid Valid Valid Based on Table 4, expert validation data was analyzed using the Aiken Coefficient (AikenAos V). The results of AikenAos V calculation were then compared with the criteria or minimum limit of the Aiken coefficient. The IRT model validation instrument used a scale of five and the number of experts . was seven, thus obtaining a minimum limit of item validity of 0. 82 (Aiken. Based on Aiken's V limit of 0. 82, each component of the IRT model manual has AovalidAo Preliminary field testing The IRT model manual that has been validated is then tested on limited sub-sectors . reliminary field testin. Limited testing is carried out on five student subjects and five practitioner lecturers. The practitioner lecturers are asked to pay close attention to the IRT model manual and then assess the practicality of the model manual. Students also looked at the model manual and then responded to a practicality questionnaire instrument. Suggestions from practitioner lecturers are used to improve the IRT model manual. The results of the practicality assessment by the lecturer are then analyzed for validity using Aiken validity and the results are presented in Table 5. By using Aiken's V standard of 0. 80, the IRT model developed is declared Questionnaire data from students are used to determine the practicality of the IRT model. The results of the analysis show that the average response from students is 4. 32 and is included in the very practical category. Table 5 shows that Aiken's value on all components is above 0. all components of the IRT model application are declared AovalidAo. It can be concluded that the IRT learning model is AopracticalAo for use in classroom lectures. Besides, the results of student responses, with a total of five raters, have a range of answers on a scale of five. Based on the number of raters and the scale, the minimum limit of item validity is 0. 8 (Aiken, 1. In detail, the practicality of the IRT Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. model is presented in Table 6. The table shows that the IRT model is AopracticalAo for use in lectures, even though there are some suggestions for improvement. Table 5. Practical assessment of the IRT model manual from practitioner lecturers AikenAos V IRT Model Components Orientations Conceptualization in questioning sub-syntax Conceptualization in hypothesis generation sub-syntax Investigation in exploration sub syntax Investigation into experimenting with sub-syntax Investigation of data interpretation sub-syntax Conclusion Discussion on communication sub-syntax Discussion on reflection sub-syntax Suggestion Problem Hypothesis generations Reasoning Testing Presentation Criteria Valid Valid Valid Valid Valid Valid Valid Valid Valid Valid Valid Valid Valid Valid Valid Main product revision The IRT model product resulting from the design is Draft I of the IRT Model. Furthermore. Draft I of the IRT model, which has been validated by experts, produces Draft II of the IRT model. Draft II of the IRT model is then tested for practicality by practicing lecturers and students. The results of improvements from practicing lecturers and students produce Draft i of the IRT model. Draft i is then used in the main field testing. Table 6. The practicality of the IRT model from student response AikenAos V IRT Model Components Orientations Conceptualization Investigation Conclusion Discussion Suggestion Problem Hypothesis generations Reasoning Testing Convenience Criteria Practical Less practical Less practical Practical Practical Less practical Practical Less practical Less practical Practical Less practical Main field testing Furthermore. Draft i of the IRT model was tested through the main field-testing stage. The test was conducted on the School Science Study i course, which includes Environmentally Friendly Technology material. This material was chosen because, in addition to being interesting, it also has urgency for preservice science teacher students to master. A limited test was conducted involving 10 students of Universitas Negeri Yogyakarta in semester V of the 2021/2022 Academic Year in August 2023. The trial was conducted to determine the implementation of the IRT model and the effectiveness of the IRT model in improving PCK. The research design used at this stage is the Pre-Experiment: One-Group Pretest-Posttest Design. The test subjects were given learning using the IRT model. Before learning, a pretest was conducted to determine the initial PCK and a posttest was conducted to determine the PCK after learning using the IRT model. Pretest and posttest data were analyzed using a paired sample t-test hypothesis test. Before the difference test, a prerequisite test was conducted, namely the normality test to determine Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. whether the data were normally distributed. The results of the normality test using Shapiro-Wilk with samples below 100 are presented in Table 7. Table 7. Data normality test results Shapiro Wilk Statistic Df Sig. Pre-test Post-test Table 7 shows that the pretest and posttest data are normally distributed, indicated by a significance value greater than or equal to 0. After the normal distribution is known, the next step is to test the pretest and posttest data using a paired sample t-test to determine whether the IRT model can empower the PCK of preservice science teacher students. The recapitulation of the results of the paired sample t-test hypothesis test is presented in Table 8. Table 8. Paired sample T-test hypothesis test results Mean Pretest-posttest Std. Deviation Paired Differences Std. Error Lower Upper Mean Sig. Table 8 enumerates the difference in the average pretest and posttest scores. The average pretest score is 49. 58, and the average posttest score is 56. 66 with Sig. Value . ne-taile. As this study uses a one-way hypothesis, the Sig. Value . -taile. is divided by two. the result is 026, smaller than 0. ignificance level 5%). This value suggests that the PCK of students after participating in learning with the IRT model is higher than before participating in learning with the IRT model. Operational product revision After the main scale model test, it continued with revision. Improvements were made to several parts, as shown in Table 9. Table 9. Improvements to main field testing No. Revision Detailing the apperception steps in the lecture plan The time to direct students to formulate problems can be shortened so that not too much time is Operational field testing In the operational field-testing step, a product effectiveness test was conducted. This test was conducted to determine the effectiveness of the IRT model compared to the existing model, namely the inquiry model. At this stage, an expanded test was conducted involving 56 students in 2 study groups from Universitas Negeri Yogyakarta. The two classes were used as control and experimental classes. The research design used was Nonequivalent Control Group Pretest-posttest Design. Learning in the control class used Inquiry, where this learning is commonly used as the basis for developing the IRT model. While in the experimental class, the treatment was given with the developed IRT model. All classes were given a PCK pretest and posttest. The data from the control and experimental classes were then tested for hypotheses by conducting prerequisite tests for normality and homogeneity. Operational field-testing data normality test The normality test was conducted using Shapiro-Wilk, considering the number of samples All experimental and control class data in the form of pretest and posttest were tested for normality. The normality test results are presented in Table 10. Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. Table 10. Results of operational field-testing data normality test Shapiro-Wilk Statistic Df Sig. Group Experiment Pretest Experiment Postest Control Pretest Control Postest Based on Table 10, the significance value of the experiment pretest, experiment posttest, and control pretest is above 0. 05, meaning the data is normally distributed. However, the posttest control data is not normally distributed. Operational field-testing data homogeneity test The homogeneity test is conducted to determine whether data from two or more groups come from populations that have the same variance . One way is to use the Levene If the significance of homogeneity is greater than 0. ig>0. , then the variables in both groups . xperimental and contro. are said to be homogeneous. The results of the homogeneity test are presented in Table 11. Table 11. Results of operational field-testing data homogeneity test Pedagogical Content Knowledge Test Result Based on Mean Levene Statistic Based on Median Based on the Median and with adjusted df Based on trimmed mean Sig. Table 11 shows that the value of the significance based on the meaning is 0. 100 which means it is greater than 0. This shows that both groups in the pretest and posttest data were declared through homogeneous Mann-Whitney Hypothesis testing. After conducting prerequisite tests for both normality and homogeneity, the hypothesis test was conducted. The hypothesis test used the Mann-Whitney test because the experimental posttest and control posttest data had a non-normal distribution. The following are the hypotheses that were tested. Ho: The PCK ability of prospective science teacher students who use the IRT model is not significantly different from the PCK ability in classes that use the inquiry model. Ha: The PCK ability of prospective science teacher students who use the IRT model is significantly different from the PCK ability in classes that use the inquiry model. The Mann-Whitney test was conducted on the pretest and posttest for the experimental and control groups. The results of the Mann-Whitney test with two groups, namely the experimental class and the control class, are presented in Table 12. Table 12. Mann Whitney analysis results Class Posttest experiment Posttest control Asymp. Sig. Mean Baed on Table 12, the significance value obtained is 0. this means that Ho is rejected, and Ha is accepted. It can be concluded that there is a significant difference between the experimental group and the control group. Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. Discussion This study aims to find the feasibility, practicality, and effectiveness of the IRT (Inquiry Reflective Teachin. model that was developed. The IRT model has characteristics consisting of components including: . syntax or learning steps. social system, namely the atmosphere and rules in learning. principle of reaction, namely providing an overview of how to respond to . support system, namely facilities and infrastructure and learning environments that support the learning environment. instructional and nurturant effects, namely the impact of learning that will be achieved and the accompanying impact after learning. The learning model is a description of a learning environment that includes teacher behavior when the model is applied (Joyce & Weil, 2. The IRT model is a teaching or lecture model based on the inquiry teaching model integrated with reflective thinking in planning science learning. The inquiry teaching model includes orientations, conceptualization, investigation, conclusion, and discussion. The reflective process includes suggestions, problems, hypotheses, reasoning, and testing (Joyce & Weil, 2009. Pedaste et al. , 2015. Loughran, 1. This model was developed to equip PCK (Pedagogical Content Knowledg. of preservice science teacher students. Based on the research results, explanations from the research results, and the IRT model development process carried out, the following results were obtained. Eligibility of the model The IRT model obtains feasibility with AovalidAo criteria for all components and practicality in the very practical category. This model includes an introduction, theoretical basis, syntax, social system, and presentation. This model is adapted to the competencies of students as science teachers at the junior high school level. Preservice science teacher students must have the ability to teach science according to the nature of scientific knowledge and specific to certain content. This is in accordance with the essence of science, that science is rational knowledge about the universe and all its contents obtained through the scientific process. Koballa and Chiappetta . define science as a way of thinking, as a way of investigating, and as a body of knowledge, and its interaction with technology and society. It can be concluded that in science, there are dimensions of ways of thinking, ways of investigation, building knowledge, and its relationship to technology and society. According to Sund and Trowbridge . , the word science is Auboth a body of knowledge and a process. Ay science is thus can be defined as building knowledge and Based on the content validity using Aiken's V, it was obtained that all components of the IRT model were declared AovalidAo by experts. The AikenAos V1 validity index value of each aspect is greater than the minimum value of the Aiken validity index of 0. Based on this assessment, it can be concluded that the IRT model has AovalidAo criteria or is feasible to be implemented in The developed IRT model is worthy of being reviewed from the components of the IRT The IRT model already contains components of the learning model in accordance with the model components according to Joyce & Weil . , including theoretical basis, objectives, syntax, and social system. Practicality of the model Practicality refers to the ease of the model to be used by the subject of study. This model is said to be practical if students and lecturers find it easy to use the IRT model in learning. The IRT model that has been approved by experts is then tested for practicality in a limited scope before this model is used. The subjects involved in the practicality test were five practicing lecturers and five student users. The results of the practicality test from the practicing lecturers showed that all model components had attained the AopracticalAo criteria. However, the practicality test from students showed that several model components had a level of practicality that was not yet optimal, including the conceptualization, investigation, and suggestion stages. In addition, the visual aspect . includes clarity of images, clarity of sentences, problem orientation, and completeness of student activity sheets. These deficiencies are the basis for improving the IRT model product. Likewise, the results of the practicality assessment from the practicing lecturers Copyright A 2025, author, e-ISSN 2442-8620, p-ISSN 0216-1370 Cakrawala Pendidikan: Jurnal Ilmiah Pendidikan. Vol. 44 No. June 2025, pp. obtained suggestions for improvement including: . clarity of each syntax. clarity of images. implementation of the model. and learning steps in the learning implementation plan. There are differences between the hypothetical model and the final IRT model. In the final IRT model, each syntax has been detailed to better guide students, including the syntax of problem orientation, formulating hypotheses, data interpretation, suggestions, problems, hypotheses, reasoning, and testing. Effectiveness of the IRT model Based on the difference test, there is a significant difference in the PCK ability of the control and experimental groups. The significance value is 0. 041 (<0. so H0 is rejected, and Ha is accepted. It can be concluded that there is a significant difference between the experimental group and the control group. The average PCK ability of the experimental group is 60. The average control group is 54. The PCK ability of the experimental group using the IRT model is higher than that of the control group using the inquiry model. In terms of effect size, the magnitude of the effect of implementing the IRT model on Universitas Negeri Yogyakarta (UNY) students is 0. 66, with a moderate category. Effect size categories include Ou 0. 8 with a large 3 O x <0. 8 with a medium category. and 0