This grounded theory study examined prospective teachers' (PTs) dispositional hopes, teaching-specific hopes, their sources, and motivational force of teaching-specific hopes. A total of 41 PTs enrolled on different teacher education programmes voluntarily participated in the semi-structured interviews. Findings showed that PTs' dispositional hopes revolved around an active/passive axis, and originated from internal, external, and combined sources. Teaching-specific hopes were explained through five categories: relationships with others, teaching, student achievement, student motivation, and student development. Regardless of axis or source, teaching-specific hopes had a substantial motivational force on PTs' preparation toward their future careers. The current study urges teacher educators and policy-makers to consider PTs' teaching-specific hopes together with their motivational roles in preparing them for their future careers.