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The aim of this research is to analyze high school students' ability to solve physics problems as a consideration for implementing the PBL learning model assisted by Android-based 3D digital modules. The research method uses descriptive qualitative analysis techniques to find out information about a problem the facts face. The research was conducted at SMA Nahdlatul Ulama 1 Gresik with 160 students as respondents. Data obtained from research respondents were categorized into three groups, namely low (score 0-40), medium (score 41-70) and high (score 71-100). From the research results, there were 154 students in the low category, while there were 5 students in the medium category and 1 person in the high category. The conclusion is that students' ability to solve physics problems is still low and needs to be improved, so it is necessary to provide innovative learning models and media, one of which can be done by implementing PBL models and media in the form of Android-based 3D digital modules which will make students more interested in learning so that helps hone physics problem solving skills.

The research aims to develop a four-tier test for optical instrument materials. The method used in this study is a 4D design that includes defining, designing, developing, and disseminating. The instrument used consisted of fifteen items in the form of a four-tier closed-ended test. The research participants were 60 female and 15 male students from West Java in grade 11 high school who were randomly selected. The analysis is divided into four parts. The first analysis is a CVR and multi-rater Rasch measurement of the original validation results. The second analysis involves calculating the percentage of students' scores based on their conception scores. The third is a Rasch Model analysis of the instrument's validity and reliability. The Rasch Model is used in the fourth analysis to examine conceptions and misconceptions. Following the analysis, all items met the CVR value criteria. I2, I7, I9, I10, I12, I15, and I3 have logit values less than zero and are corrected based on expert feedback. The second analysis reveals that students continue to have misconceptions about each item. According to the third analysis, all items were valid and reliable, with a Cronbach Alpha value 0.78 in either category. According to the fourth analysis, conception is inversely related to misconception. The fewer misconceptions, the better the students' conceptions, and vice versa. However, confidence can also be a dissonant influence. Students who experience misconceptions need to be given appropriate treatment to reduce misconceptions about optical instrument materials. Hopefully, the four-tier closed-ended test that has been developed can be used and developed into a better five-level test to investigate the causes of each student's misconceptions.

This study aims to develop and examine students' conceptions of Work and Energy in relation to the Indonesian Capital City in East Kalimantan, using the Four-Tier Test of Work and Energy (FORTUNE) Open-Ended. The 4D methodology was followed, involving defining, designing, developing, and disseminating the research. The FORTUNE test, comprising 13 questions, was administered to 70 tenth-grade students (44 girls and 26 boys) aged 15 to 16. Rasch analysis was applied to categorize student responses into seven distinct categories: Sound Understanding (SU), Partial Positive (PP), Partial Neutral (P0), Partial Negative (PN), Misconception (MC), No Understanding (NU), and No Coding (NC). The results revealed that FORTUNE effectively diagnosed students' conceptions, with 61% of responses falling into the Misconception (MC) category, while only 3% were classified as Partial Positive (PP). Notably, students displayed misconceptions in questions of moderate difficulty, as indicated by Rasch analysis. In conclusion, this study successfully developed and implemented the FORTUNE Open-Ended test to assess students' conceptions of Work and Energy in the context of the Indonesian Capital City in East Kalimantan. The findings highlight the prevalence of misconceptions among students, particularly in questions of moderate difficulty. Addressing and rectifying these misconceptions require targeted instructional strategies to foster a deeper and more accurate understanding of the topic. Future research should explore the effectiveness of intervention programs aimed at enhancing students' conceptual understanding of Work and Energy.

The aim of this study was to develop a Prediction, Alternative conceptions, Refutation, Observation, Comparison and Scientific explanation (PAROCS) strategy to change students’ alternative concepts on inertia concept. The research method used is the 4D model (Define, Design, Develop and Disseminate). Participants were 30 students (15 boys and 15 girls, their average age were 15-16) in class X of a public high school in Sukabumi, West Java. The instrument used is a four-tier diagnostic test. Data were analyzed based on a 4D model and conceptual category. At the disseminate stage, it shows an increase in scientific concepts and a decrease in alternative concepts after the application of the PAROCS strategy. From this, it can conclude that PAROCS strategy can be developed to change students’ alternative concepts into scientific concepts. Further studies could not only use the PAROCS strategy, but also develop this strategy for different physics concepts.