This research aims to develop PowerPoint-iSpring learning media on redox topic and determine its level of validity. This research used educational design research which is developed by Plomp. Research procedures consist of preliminary research stage, prototyping stage and  assessment stage. Instruments used was validation sheets consist of content, construct and media validity questionnaire, and one to one evaluation interview sheet. Subjects of this research were chemistry lecturers of FMIPA UNP, chemistry teachers as topic experts, engineering lecturers of FT UNP as media experts, and 10th grade students of SMAN 3 Mukomuko in the 2021 to 2022 academic year. Data obtained were analysed by using the Aikens V formula, and the results indicate that the PowerPoint-iSpring learning media on the redox material developed as a whole is valid. The average value of content validity for basic competency index 1, 2 and 3 is as followed 0.84, 0.83, and 0.83. The average value of construct validity for basic competency index 1, 2, and 3 is as followed 0.85, 0.86, and 0.85. The average value of media validity for basic competency index 1, 2, and 3 is 0.97.

STI is a contagious disease that often occurs in risk groups such as FSWs in the Solong area, the working area of Samarinda’s Temindung Help Center. This study aims to determine the behavior of women sex workers in the prevention and search for treatment of sexually transmitted infections in the working area of Temindung Helping Health Center 2019. The purpose of this study is to find out the knowledge, attitudes and actions of FSWs in prevention and search for treatment in the work area of Temindung Helping Health Centers. The method used is a qualitative method with a case study approach through interview, observation and documentation techniques with 6 research informants WPS understanding of STI is more focused on general symptoms such as itching without knowing the type of STI and other specific characteristics. The attitude of WPS shows that it supports that agreeing STI must be prevented and treated appropriately and quickly while actions to prevent STI are still lacking which is indicated by not using condoms when serving customers. Efforts to search for STI treatment on WPS immediately seek medical treatment routinely to Health Care Workers and some use general medicine (Amoxicilin) It is recommended to be given counseling individually and counseling, especially at the time of treatment.