Adolescents' food behaviours at school are complex because of multifactorial influences within the school [1]. Australian research focusing on the food behaviours of adolescents during school time; including what they eat at school, how parents and teachers are involved and handle the responsibility of school food behaviours and adolescents’ suggestions to improve those behaviours is scarce. As such, this study aims to 1) explore adolescents’ perceptions and experiences regarding their school food behaviours and the roles played by teachers and family in shaping their school food behaviours, and 2) to explore adolescents’ suggestions to improve their school food behaviours. Australian secondary school students currently studying in years 8-11 are being interviewed virtually via the video calling platform Zoom. For data collection, a semi-structured interview guide is being employed, consisting of seven open ended questions on four food-related aspects; (1) adolescents' eating patterns at school, (2) food-related communications between adolescents and family and teachers (3) decision-making responsibility regarding the food adolescents eat at school, and (4) ways of improving adolescents' school food behaviours. Interviews commenced in May 2025, and to date, a total of seven interviews out of the estimated sample size (n = 25) have been completed. Those interviews lasted between 12-20 minutes. The interviewed sample consisted of both male (n = 4) and female (n = 3) students. These students represented years 8, 9 and 10, all school types (i.e., government, non-government, catholic and other) and were from Victoria and Queensland. Remaining interviews will be completed by December 2025. The completed interviews were transcribed verbatim and the interviews were inductively coded using NVivo 15 software. Adopting a constructivist paradigm, the data are being analysed following the reflexive thematic analysis approach [2]. Preliminary analysis resulted in three themes. Theme 1: School food decision responsibility as a parent-child negotiated space, which highlights that adolescents value their parents’ guidance in food decisions while valuing their ability and autonomy to contribute; Theme 2: Disconnection between nutrition learning and school practices; nutrition lessons taught at school are not reflected in practice due to poor canteen offerings and the passive role of teachers and Theme 3: Calls to improve the school canteen and support home-packed foods; students suggested improvements to the canteens such as increasing healthy and affordable food options, reducing junk food etc. Additionally, they elaborated prioritising bringing home-packed foods to school over purchasing canteen foods and offering healthy cooking programs for parents would facilitate their healthy eating at school. These preliminary themes identified are likely to be further refined or changed as data collection continues. Findings highlight that to sustain healthy school food behaviours of adolescents, there remains significant room to improve secondary school canteens, active involvement of teachers and continued parental support.