Through the lens of post-structural agency, this article focuses on how self-identified smart girls strategically negotiate their academic identities within the gendered terrain of the school. Based on interviews with 51 smart high school girls in Canada, our analysis complicates current narrative of girls' easy achievement in school. Participants discussed balancing the hazards of being overly academic with the rewards of academic success. In response to this tension, girls carefully and consciously performed "smart girlhood", drawing on resources that are more available to some girls than others, and indicating that girls' academic success is neither easily embraced nor unambivalently accepted.