Kids Gardening
Hands-on projects like gardening that allow children to explore at their own pace and engage in experiential learning have a high rate of success. http://www.kidsgardening.com/teachers.asp
Youth Education at arborday.org
Lessons and activities that educate and inspire young people to understand, plant, and care for trees to build a better future. http://www.arborday.org/kids/index.cfm
Teacher Resources @ Lady Bird Johnson Wildflower Center
Provides instructors with materials to use both in the classroom and in the field. http://www.wildflower.org/teachers/
Michigan 4-H Children's Garden at MSU
An online version of the real garden at MSU. Includes curriculum materials and activities for teachers. http://www.4hgarden.msu.edu
The Great Plant Escape
Six interdisciplinary plant science lessons that help students increase their understanding of how foods grow. (English & Spanish) http://www.urbanext.uiuc.edu/gpe/index.html