Language teachers’ ability to be “change agents” (Van den Branden, 2016) and engage in pedagogical innovation is constrained by internal and external forces, including existing beliefs, institutionalized practices, and socio-political forces (Carless, 2013). This article offers an expanded framework to more comprehensively understand the many factors affecting teachers’ willingness and ability to innovate. I used a focal participant case study approach to explore a novice language teacher’s experience implementing Task-Based Language Teaching (TBLT), in China. Data were generated via a semi-structured interview and recursively coded inductively and deductively. Using a multi-level, nested ecological framework (Chong et al., 2022; Douglas Fir Group, 2016), I assert that teachers’ engagement in and with innovation is facilitated and constrained on micro-, meso-, and macro-levels. Teachers’ innovation potential is dependent on access to a network of “meaningful others” (Van den Branden, 2022), which, in the present study, included institutional stakeholders, expert mentors, and empirical research. I conclude that teachers’ decisions to pursue or abandon a particular educational innovation (e.g., TBLT) is based on a complex network of internal and external facilitators and constraints, and understanding these factors and their inter-relationships is critical for a comprehensive evaluation of the (successful or failed) implementation of educational innovation.