Pendahuluan: Tangan merupakan media yang sangat mudah untuk penyebaran penyakit dan infeksi pada manusia karena tangan sering melakukan kontak dengan lingkungan, terutama pada bagian kulit tangan yang paling sering digunakan sehingga rawan terhadap kontaminasi, sebab itu dibutuhkannya sabun pencuci tangan cair yang diyakini dapat membersihkan tangan dari microorganisme. Berawal dari hal tersebut, maka penelitian terkait inovasi sabun cuci tangan cair dengan penambahan bahan alam dilakukan. Bahan alam yang dipilih adalah daun seledri yang mengandung saponin, flavonoid. Tujuan: Untuk mengetahui formulasi menggunakan ekstrak  daun saledri (Apium graveolens L. ) sebagai antiseptik sabun cair. Metode: Penelitian ini menggunakan eksperimental untuk meneliti sedian sabun cair dengan konsentrasi 0%, 2,5%, 5%, 7,5% . Berdasarkan hasil yang di uji pH dan organoleptis terdapat pengaruh perbedaan warna dan uji pH pada sedian sabun cair menunjukkan semakin besar konsentrasi dalam sedian sabun cair semakin rendah pH kulit yang didapatkan. Hasil: Hasil pemeriksaan penampilan masing-masing formula sediaan sabun cair yang paling bagus konsentrasi 2,5% .Tidak terjadi perubahan bau, warna, pH kulit berkisar antara 5,0-6,5 dan tidak terjadinya iritasi pada kulit sukarelawan.  Kesimpulan: Penelitian yang telah dilakukan menunjukkan bahwa daun seledri dapat diformulasikan sebagai sabun cair antiseptik bentuk sediaan cair untuk pemakaian tangan.

This study aims to determine: (1) Describe the audio visual learning media based on genius learning which is effective for class X students of SMK Tritech Informatika Medan, (2) Describe the results of the development carried out on genius learning-based audio visual media for class X SMK Tritech Informatika students. Medan, (3) Describe the reasons for using audio-visual learning media based on genius learning in developing exposition text learning media. This research is a development research using the Borg & Gall model which aims to develop an audio-visual learning media based on genius learning that will be used as an exposition text learning medium. This learning media will be tested from material experts, design experts, media experts, Indonesian language teachers, and students of SMK Tritech Informatika Medan, consisting of 3 students in individual trials, 9 students in small group trials, and 25 students in field trials. The instrument used in this study was a questionnaire. (1) The results of validation by material experts with an average of 79% with good criteria, (2) validation results by media experts with an average of 80% with good criteria, (3) validation by instructional media design experts with an average of 82 % with very good criteria, (4) the response of Indonesian language teachers with an average of 86% with very good criteria, (5) the acquisition of individual trial results with an average of 78.5% with good criteria, (6) The acquisition of trial results small group with an average of 79% with good criteria, (7) Acquisition of field trial results with an average of 83.54% with very good criteria, (8) Student learning outcomes before using audio-visual learning media based on genius learning were 66.2 and after using audio-visual learning media based on genius learning with an average score of 78 in the good category. The difference obtained is 11.8. This proves that the genius learning-based audio-visual learning media developed can improve student learning outcomes, thus, this genius-based audio-visual learning media is effectively used in learning exposition text.