Development student book virus on problem-based learning assisted augmented reality to improve critical thinking skills

Empowering critical thinking skills in learning requires the innovation of teaching materials related to and supporting the learning process. In addition to innovations in teaching materials, integrating technology in teaching materials is also needed to support 21st century learning. This research aims to develop a problem-based learning virus-based learning student's book with the help of augmented reality media to empower students' critical thinking skills. The implementation of this research is in the Odd Semester of the 2024/2025 Academic Year. This research uses the Reseach and Development (R&D) method with the ADDIE development model which consists of five stages, namely analysis, design, development, implementation and evaluation. The instruments used to measure the validity, practicality, and effectiveness of student books include validation sheets, student response questionnaires, and critical thinking skills test questions. The results of the research at SMAN 1 Manokwari show that the student book of problem-based virus material assisted by augmented reality class X at SMAN 1 Manokwari is very valid, very practical and quite effective as a teaching material to empower students' critical thinking skills. This can be seen from the average validity score of the validator of 99.37%, the average practicality score of 88.03%, and the average effective score of 52.72%.