This study describes religious instruction for students with autism conveyed by classroom teachers, Islamic Education teachers, shadow teachers, and parents through a mentoring program in school and family environments. This qualitative phenomenological study was carried out in an inclusive primary school in Surakarta, Central Java, Indonesia. Five students with autism and their parents, five classroom teachers, five shadow teachers, and three Islamic Education teachers were involved in this study. Data were collected through in-depth interviews, participant observation, documentation, and focus group discussions (FGDs). They were analyzed using interpretative phenomenological analysis and an interactive approach. This study reveals that optimal outcomes of religious instruction entail collaboration among Islamic Education teachers, classroom teachers, shadow teachers, and parents with the assistance of psychologists, counsellors, therapists, pedagogues, and school policies. Such collaboration is particularly required in the implementation of an adaptive curriculum, lesson plans, learning implementation, evaluation, mentoring and the habituation of worship. The modification of learning methods, media, and evaluation is also required.