Much evidence exists that culturally responsive and equitable teaching practices are challenging to develop. Evidence exists that in-the-moment coaching of "rehearsals" of practice can help foster mathematics teaching strategies, but how such coaching can assist the development of culturally responsive practice is less clear. Drawn from a larger study into rehearsals of practice, this article illustrates how teacher educator modelling of instructional activities with in-the-moment coaching can provide opportunities for professional noticing of culturally responsive teaching practices. Such opportunities were identified across seven videos of rehearsals of practice in which teacher educator pairs modelled and coached mathematics teaching. Examples are discussed in relation to facilitation of professional noticing and two aspects of a framework of "cultural competencies" for teachers of indigenous Maori learners. Implications include enhanced equity of access to mathematics learning through pre-service teachers being able to notice, discuss, and use culturally responsive teaching practices.