There is a growing recognition in society that more needs to be done to support LGBTQ youth in schools. In particular, school climate reports reveal that this need is particularly pressing for transgender individuals who are little understood and often rendered invisible or made to conform to gender-normative social standards. This mixed methods study surveyed and interviewed preservice teachers at three Catholic institutions. In particular, we focus on the shifting landscape of Catholic education in Canada as it relates to the (...) support of transgender youth. The content of the study is framed by a common first grade social studies theme: family diversity, and takes its lead from the recent papal urging to pursue topics of discomfort at the peripheries of Catholic thinking. We explore how Catholic preservice teachers respond to the idea of teaching about transgender-parent families. The findings show there is dissonance between the personal and professional beliefs of new Catholic teachers. This dissonance is reflective of the beliefs held by North American Catholics at large, thus further illuminating the challenges and opportunities that are present in the emerging discussion about how to best support transgender students in Catholic school contexts. (shrink)