Check these web sites for lots of useful information about starting and maintaining a schoolyard garden.
Designing a School Garden
From Kids Gardening.org
As you design and your garden program and layout, consider these elements to ensure you meet the needs of your community..
Green Thumb Challenge
From the Green Education Foundation
The Green Education Foundation (GEF) provides gardening instructions; checklists for school approvals; plot location guidelines; container garden suggestions; funding resources; garden plans, vegetable and flower suggestions; and more. In addition, GEF is calling on schools and youth groups nationwide to plant 10,000 classroom and outdoor gardens – the largest youth gardening initiative in history!
From the Texas Agricultural Extension Service's 4-H Association
This web site also offers advice and a step-by-step guide.
Schoolyard Habitat: Stewardship Through Action
https://www.fws.gov/chesapeakebay/helping-communities/schoolyard-habitat.html and https://www.fws.gov/chesapeakebay/PDF/helping-communities/schoolyard-habitat/HabitatGuideColor.pdf
From the U.S. Fish and Wildlife Service
The U.S. Fish and Wildlife Service has developed a guide to provide the basic steps needed to restore or create wildlife habitat. It is designed so that students complete several tasks that will lead to establishing a forest, meadow or wetland on school grounds. The projects can range in size from a small 20’ by 20’ area to an acre or more. These steps were developed from the experiences of several schools that have completed similar projects. The process incorporates critical thinking and decision-making skills while challenging students in reading, writing, science, mathematics and language arts.