<![CDATA[Scientific literacy among high school students needs to be strengthened through contextual and experiential learning that connects scientific concepts with their applications in everyday life. This community service program aimed to support teachers in developing experiment-based learning activities to enhance students’ scientific literacy through the utilization of coconut oil and beeswax as thermal energy storage materials. The activities consisted of scientific material delivery, experiments involving coconut oil and beeswax, assembly of a simple mini cooler prototype, and observation and temperature measurement. The results showed that participants' understanding of phase change and energy concepts improved, with an average post-test score of 98.75; furthermore, participants successfully produced a mini cooler prototype based on coconut oil and beeswax. The prototype can be utilized as a learning medium to introduce phase changes, heat transfer, and thermal energy storage concepts. The activity also provided teachers with an applicable approach to designing experimental learning that encourages students to observe phenomena, interpret experimental data, and apply scientific concepts to real-life situations. This program demonstrates the potential of locally available materials and simple experimental technology to support the development of innovative science learning and strengthen scientific literacy among high school students.]]>
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