This study examines conversations in a Swedish teachers’ School Rebellion (SR) group on Facebook, a group that attracts members who wish to engage in activism for a different and better Swedish school system and improved conditions for teachers. The phenomenon of teachers’ Rebellion Facebook groups is relatively new. It has emerged in several countries over the past decade and clearly differs from traditional online teacher collaboration and professional development groups. Placing the Swedish SR initiative in the context of discussions on changing teacher professionalism over the last decade, the aim of this study is to examine what content is given presence in SR posts and how it is discussed by members and to determine the extent to which the communication between the participating teachers has the potential to strengthen collective professionalism. To this end, curriculum theory and the concept of deliberative communication are combined to address questions of content and various relations between actors and levels, such as power and responsibility issues. The analysis shows that many topics related to teaching and education appear in the conversations, deliberative approaches vary from what is termed pre-deliberative to deliberative and even counter-deliberative. Although all participants have a voice, the administrators’ role is shown to be of special interest. Based on these findings, the administrators’ responsibility to maintain professional collegial deliberation is discussed as a complex mission of deliberation over political, pedagogical, and practical issues.