The Institute of Mathematical Sciences and Physics (IMSP) recently partnered with the Filipino Science Hub (FilSciHub) to provide workshops for high school teachers on different subject areas in mathematics and physics. Last year, the Mathematics Division hosted MathTex 2023, a three-day workshop that focused on the contextualization of learning and teaching calculus in high school. Moreover, to identify and clarify common misconceptions in high school-level classical and modern physics, a two-day lecture was conducted by the Physics Division. By empowering high school teachers with effective teaching strategies and accurate content knowledge, these extension activities contribute to enhancing STEM education in the Philippines.