A “store” for gardening supplies as well as articles, lesson plans and updated grant opportunities: www.kidsgardening.org
This horticulture educator from Illinois combs the net for school garden stories, and it is a diverse and excellent collection. I use it a lot: http://www.scoop.it/t/school-gardening-resources
“Created to allow students, teachers, parents and volunteers the information necessary to start and maintain a successful school garden” A great place for the nuts and bolts!: www.schoolgardenweekly.com
A gorgeous collection of ideas for kids’ gardens: http://pinterest.com/dawnisaac/kids-garden-ideas