The present study focuses on students and teachers in Swedish Municipal Adult Education, in a project aimed at helping students with diagnoses within the neuropsychiatric spectrum. The project aimed to support students to complete their studies for further higher education. As this is an overlooked group of students research results provide insights into students’ views on the project and conclusions regarding the sustainability of school development. In this qualitative study, five teachers and four teachers were observed and in-depth interviewed. Data were analyzed through inductive content analysis. Authentic relations between students and teachers, signified by mutual trust, proved important. As the teachers themselves had originated the ideas guiding the project, the development work had good prior conditions for further sustainable development. We conclude that autonomous teachers, who set up joint goals and provide individualized support for these students, enable academic success when flexibility, relations, and self-esteem characterize the work.