Science education expertise focuses on enhancing the quality of teaching and learning in science through research-based instructional design, scientific literacy development, and innovative pedagogical approaches. This includes the integration of inquiry-based learning, multiple representations, assessment using modern measurement models such as Rasch analysis, and the application of lesson study for continuous professional development. The goal is to empower educators and learners to think critically, act scientifically, and engage meaningfully with real-world challenges through science.