Strong family-teacher partnerships increase family engagement, promoting positive outcomes for children. Early childhood educators need knowledge, skills, and dispositions for establishing strong, meaningful partnerships with diverse families. This research investigated the impact of academic service-learning (ASL) on undergraduate students' knowledge, skills, and dispositions for partnering with culturally and linguistically diverse families to promote young children's early academic learning. Participants included nine undergraduates in an early childhood teacher preparation course, ten culturally and linguistically diverse families, and thirteen 2- to 5-year-old children. In this mixed-methods study, written student ASL reflections, pre- and post-ASL student surveys, and parent evaluations were analyzed. Three themes emerged from the analysis: (1) Students entered the ASL experience with excitement and a mostly positive approach; (2) Early to mid-semester, students articulated a high degree of nervousness and discomfort as well as challenges to partnership-building, yet also noted family interest and engagement; and (3) Mid- to late semester, most students expressed their growing confidence in their own skills for relating to diverse families, and identified family strengths. Our findings support ASL as an effective teacher-preparation pedagogy to help students build family-teacher partnerships.