This study focused on teachers' self-directed learning; a concept derived from adult learning theories that accommodates for the idea that teachers formulate their own learning needs and consequently direct their learning. Teachers from 11 Dutch secondary schools (N = 309) were asked about their preferred learning domains ('what'), their preferred learning activities ('how'), and their reasons to learn about a selection of learning domains ('why'). In regression analyses we tested for linear and non-linear relationships between teachers' teaching experience with their self-directed learning. Early- and late-career teachers showed higher preferences compared to mid-career teachers to learn about classroom management domains. (C) 2017 Elsevie...