Humanoid robots are being used in some schools, however, research on the use of these robots is relatively new. In this three-year study, humanoid robots were deployed in 10 schools, involving 29 teachers across early childhood to Year 10. This study aimed to ascertain teachers' perceptions of the benefits and challenges, the pedagogical practices that helped with student engagement, and where the robots fitted in the curriculum. Through multiple case studies, teachers' views were explored and results from the study supports the deployment of humanoid robots. The study advocates a constructivist inquiry approach to using humanoid robots across the curriculum.