Introduction: Research has indicated that need-supportive learning environments positively influence students' motivation. According to self-determination theory, a need-supportive learning environment is one in which teachers provide structure, autonomy support, and involvement, and thereby support their students' psychological needs for competence, autonomy, and relatedness. In this study, we aimed to explore whether teachers of students with congenital deafblindness provide such an environment and how they adjust their need-supportive teaching to these students. Methods: We conducted an in-depth analysis of teacher-student interactions using a multiple-case-study design. We analyzed videos of teacher-student interactions from the perspec...