Formal education programs at public gardens are structured lessons, activities, and classes led by qualified teachers that have defined educational goals and materials. They signal a garden's values and direction, allow it to communicate in-depth about the environment, and influence public discourse. Audiences include students of all ages, teachers, professionals, and community members. Good programs are place-based, project-based, developmentally appropriate, accessible, collaborative internally and externally, and evaluated. Starting with an educator and putting them in dialogue with other staff ensures quality programming that sustains over time.