This is an analysis of how specialist music teachers sing and teach how to sing, based on data collected from six case studies carried out in Spanish primary schools. The study aimed at understanding classroom singing practices, and in particular the provision or absence of vocal instruction in relation with teachers' singing models. The findings support claims for thorough vocal training in the preparation of music teachers to enable them to face the challenges of the profession. Also suggested is the need to provide them with a coherent theoretical framework about the teaching and learning of singing.