Given the ubiquity of curriculum materials and complexity of their usage, it is imperative that teacher education programs prepare prospective teachers (PSTs) to use curriculum materials. In this paper, we focus on what PSTs notice when they are interacting with curriculum materials, and how their initial impressions of curriculum materials influence their later understandings of curriculum materials. We found that PSTs' 20-second impressions may be indicative of their longer impressions of curriculum materials, which can include their preferences, values, beliefs, and approaches to using curriculum materials. We suggest that teacher educators expose PSTs to a variety of curriculum materials to better support PSTs in planning and enacting lessons. [For the complete proceedings, see ED657822.]