Effectiveness of health communication on improving puberty readines knowledge among Indonesian elementary student: A pre-post studyFitnaningsih Endang Cahyawati, Intan Mutiara Putri, Raditia Yudistira Sujianto and Rinta Arina ManasikanaBIO Web Conf., 203 (2025) 03021DOI: https://doi.org/10.1051/bioconf/202520303021