We focus on assessing whether newly qualified teachers' professional outcome expectations and their beliefs about students' intellectual potential are associated with teachers' self-reported classroom management and instructional practices. One hundred and eighteen novice teachers participating in the induction year programme were studied during their first years as full-time teachers. Results attest to a salient association between teachers' more optimistic views of the malleability of students' intellectual potential and teachers' confidence in themselves as positive change agents in student outcomes. Also, teachers' belief-set in the beginning of their career was shown to be associated with significant differences in the level of using instructional practices promoting mastery goal orientation in the classroom as well as offering students emotional support during the learning process. In the light of the significant belief-behaviour links demonstrated, more explicit attention to the sophistication of teachers' ability beliefs in teacher education programmes is recommended.