<![CDATA[Premarital sexual behavior among adolescents remains a major public health concern due to its potential negative consequences, including unwanted pregnancy, sexually transmitted infections, and psychosocial problems. This study aimed to determine the effectiveness of audiovisual media in improving knowledge regarding premarital sexual behavior among Grade XII students at State Vocational High School 1 Merangin. A quantitative study with a pre-experimental one-group pretest–posttest design was conducted involving 75 students selected using purposive sampling. Data were collected through structured questionnaires administered before and after the intervention and analyzed using the Wilcoxon Signed Rank Test. Before the intervention, most respondents had poor knowledge (55%), while after the intervention, 87% demonstrated good knowledge. The mean knowledge score increased from 58.45 to 88.07. Statistical analysis showed a significant difference between pretest and posttest scores (p = 0.001). Audiovisual media is an effective educational tool for improving students’ knowledge regarding premarital sexual behavior. ]]>
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