To increase capacity for public participation and improve problem-solving practices, some public school districts have launched stakeholder-training programs. This mixed methods study examined the impact of five school district parent training programs (four in Colorado and one in Illinois) designed to increase trust and engagement. Data were collected from 67 trainee surveys, 21 trainee interviews, and five superintendent interviews. Quantitative analysis examined five domains: knowledge, relationships, willingness, efficacy, and action. Using qualitative thematic analysis, we examined stakeholder and superintendent interviews. Stakeholders (parents and community members) reported increased knowledge about school district operations and improved relationships with district leaders. Four main themes emerged from the superintendent interviews: building trust, advocacy, community engagement, and sharing power. Findings converged indicating that trainings increased engagement, knowledge, advocacy, and trust for district administrators. Findings suggested school superintendents can increase stakeholder trust, build capacity for public participation, and narrow the engagement gap in district affairs through stakeholder training programs.