Girl-to-Girl bullying drama is high stakes and ‘unsolved’ in an Irish school context. This paper interrogates concepts of intra-action and response-ability, to consider the human materialities at play in girl-to-girl bullying. The paper will draw on examples from qualitative research with preservice and qualified teachers in Ireland, exploring the shaping of posthuman gender and ‘school bullying’ together with human agentic, matter such as place/space, objects and time, as co- constitutive processes. It will explore the key discursive-material agential intra-actions through which ‘girl’ materialize in school- space-being-mattering's and re-mattering's with a specific focus on skincare, skirts, sexting and swots. The paper will conclude with recommendations on how a focus on new materialism offers the potential to transform the focus and response to gender bullying in our schools. How does response-ability challenge bullying or actions that lack com-passion, feeling, caring?