This study focuses on the different ways in which teachers relate their situational agency and professional assignment to the national curriculum content and curriculum dilemmas. It builds theoretically on transactional realism and empirically on analyses of interviews with teachers, exploring the nature of teacher agency during the enactment of a new Swedish curriculum reform. To uphold a dual perspective of teachers' relation to the curriculum as both collectively and individually experienced and as both an ideal and realistic--practical relation, we term the future as 'projective experiences', the presence as 'practical-evaluative experiences' and the past 'iterational experiences' in relation to agency. Especially, we are interested in the 'what' in the curriculum--what the teachers find intriguing, important or impossible and what affects how they relate to the curriculum as part of the multidimensional structures influencing their agency. This approach reveals that the crucial issue of teacher agency is related to the policy discourse on knowledge and equity as standards and the uniformity of assessment and its pedagogical consequences.