This article describes Garden Mosaics, a program funded by the National Science Foundation. Garden Mosaics combines science learning with intergenerational mentoring, multicultural understanding, and community service. The program's mission is "connecting youth and elders to explore the mosaics of plants, people, and cultures in gardens, to learn about science, and to act together to enhance their community." Students conducting the Garden Mosaics investigations develop interviewing, observation, and data-recording skills, and make important contributions to their community. The Garden Mosaics investigations are termed "i.m.science investigations" and consist of four investigations--Gardener Story, Community Garden Inventory, Neighborhood Exploration, and Weed Watch. Although the investigations were designed primarily for youth programs conducted in cooperation with community gardens, they can be adapted to school gardening, environmental sciences, and other educational programs. To further connect to their community, students in Garden Mosaics conduct Action Projects, during which they apply what they learned during the investigations to a service-learning project. (Contains 1 figure.)