IMathematics education with a focus on problem solving, mathematical reasoning, and didactical design research. Experienced in integrating computational thinking and digital tools such as GeoGebra and interactive e-modules into the teaching of algebra, geometry, and applied statistics. Specializes in lesson study-based curriculum development and designing instructional strategies that foster higher-order thinking skills. Research interests also include statistical literacy, creative mathematical communication, and the development of digital learning media to support student engagement and numeracy in diverse educational contexts.