This article aims to examine the ways in which a school–university mentorship programme promotes a range of growth experiences, both negative and positive, for the participating mentor teachers. The findings reveal that mentors saw their mentoring experience as a positive one leading to personal and professional growth and giving them a feeling of accomplishment through witnessing the benefits student teachers were drawing from the experience. The findings also indicate that the mentors experienced direct learning from their observations of the student teachers, thus breaking away from a novel/ expert unidirectional definition of mentoring. Moreover, the analysis shows that mentoring can be an effective way to renew the professionalisation of teaching by allowing mentors to recognise what they have to offer as veteran teachers, and so reaffirms the meaningful role they play in the formation of new teachers in Hawai‘i.