In this article we focus on how an experiential based approach to teacher learning about assessment for learning (AfL) provided opportunities for teachers to examine: their deep-seated beliefs about effective learning (and teaching); how these beliefs permeated their day-to-day actions and interactions with students, and the consequence of these actions and interactions for student learning. It also pays attention to how teacher self-efficacy in the use of various AfL strategies was developed through a heightened awareness of the beneficial effects of these strategies on teachers' own learning in particular.