This research aims to determine the profile of students' critical thinking skills and the application of Problem-Based Learning using three-dimensional digital modules, particularly in physics education focusing on static fluid material. Preliminary research with a sample of 106 students employs research methods including critical thinking skills tests, student response surveys, and interviews with students and teachers. The findings were analyzed using qualitative descriptive data analysis. The results of this research are as follows: Questionnaire responses reveal that students' critical thinking skills are predominantly in the low category, with 100 students in the low category, six in the medium category, and none in the high category; Among critical thinking skills, strategy and tactics rank the lowest; Teachers have implemented Problem-Based Learning through active teaching strategies, such as presentations and open-ended questions, to improve students' critical thinking skills. However, three-dimensional digital book media have not yet been utilized in physics learning; and the application of a Problem-Based Learning model supported by three-dimensional digital modules is expected to improve students' critical thinking skills in physics education. This study highlights the need for innovative learning approaches to enhance students' critical thinking skills, especially in physics education. The integration of Problem-Based Learning with three-dimensional digital modules offers significant potential for addressing this need.

This study discusses the analysis of students' critical thinking skills profile and the implementation of PBL on heat material. This study aimed to determine the profile of students' critical thinking skills and the implementation of PBL on heat material at SMAN 1 Gondang. This study used pre-research with qualitative descriptive analysis with a sample of 91 SMA Negeri 1 Gondang students. Data collection techniques were written tests, student response questionnaires, and teacher interviews. The study found that students critical thinking skills were in a low category, and inference was the indicator of essential thinking skills with the lowest average. Teachers still used lecture methods and conventional teaching materials during learning, so it was necessary to apply a model, namely a problem-based learning model assisted by a 3D module, which was expected to improve critical thinking skills on heat material. Learning innovations need to be carried out to improve students' critical thinking skills, especially in physics learning, one of which is the application of Problem-Based Learning assisted by a 3D module.