ABSTRAK Rendahnya kebersihan diri dan keterbatasan fasilitas sanitasi di Sekolah Dasar (SD) meningkatkan risiko penyakit menular, termasuk infeksi cacing. Di SD Muhammadiyah Sambon, Boyolali, siswa masih kurang memahami thaharah, penyakit menular, dan infeksi kecacingan. Fasilitas kebersihan di sekolah juga belum sepenuhnya mendukung praktik hidup bersih. Kegiatan pengabdian masyarakat ini bertujuan meningkatkan pengetahuan siswa tentang thaharah sebagai dasar kebersihan diri, mencegah penyakit menular dan infeksi cacing, serta membantu mengoptimalkan fasilitas kebersihan di sekolah. Metode yang digunakan meliputi pre-test, penyampaian materi interaktif dengan media visual, diskusi, simulasi perilaku, dan post-test untuk mengevaluasi perubahan pengetahuan. Kegiatan dilaksanakan pada bulan Januari 2026 dengan peserta kegiatan adalah siswa-siswi kelas V SD Muhammadiyah Sambon, Boyolali. Penelitian ini menunjukkan adanya peningkatan signifikan pengetahuan siswa, terutama pada materi infeksi kecacingan. Penyediaan fasilitas kebersihan turut mempermudah praktik langsung di sekolah. Hal ini, menegaskan pentingnya edukasi thaharah dan optimalisasi fasilitas sanitasi untuk mendukung perilaku hidup bersih dan sehat. ABSTRACT Low personal hygiene and limited sanitation facilities in elementary schools increase the risk of communicable diseases, including helminth infections. Students’ understanding of thaharah, communicable diseases, and helminth infections Muhammadiyah Sambon Elementary School, Boyolali, remains limited. School hygiene facilities also do not yet fully support clean and healthy practices. This community service program aimed to improve students’ knowledge of thaharah as a foundation for personal hygiene, prevent communicable diseases and helminth infections, and optimize school hygiene facilities. The methods included a pre-test, interactive learning using visual media, discussions, behavioral simulations, and a post-test to evaluate changes in knowledge. The activity was conducted on January 2026, with level 5 Muhammadiyah Sambon, Boyolali elementary school students participating. The results demonstrated a significant increase in students’ knowledge, particularly regarding helminth infections. The provision of hygiene facilities also facilitated direct practice at school. These findings highlight the importance of thaharah education and the optimization of sanitation facilities in promoting clean and healthy behaviors.
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