<![CDATA[The implementation of green chemistry principles in senior high school and vocational school chemistry education remains limited, highlighting the need for practice-based learning to improve students' knowledge and green skills. This community service program aimed to enhance the knowledge and green skills of senior high school and vocational school students in Surakarta through training on environmentally friendly hand soap formulation based on green chemistry. The program involved 20 student representatives from several schools in Surakarta and was conducted at the Industrial Chemistry Laboratory, Applied Bachelor Program in Industrial Chemistry, Universitas Duta Bangsa Surakarta. The activities employed participatory learning and experiential learning through lectures, demonstrations, laboratory practice, and evaluation using pre-tests, post-tests, green skills assessment rubrics, and participant satisfaction questionnaires. The results showed that the average knowledge score increased from 56.3 ± 9.2 to 87.1 ± 6.4, representing a 54.7% improvement with a statistically significant difference (p < 0.001). The average green skills achievement reached 90% (excellent category), while participant satisfaction reached 97%. The training also produced environmentally friendly hand soap with good physical characteristics in accordance with green chemistry principles. Overall, the program effectively improved participants' knowledge, practical skills, and environmental awareness through laboratory-based learning.]]>
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