Bay Tree Design, Inc.   www.baytreedesign.com/

EcoSchool Design   www.ecoschools.com/

San Francisco Green Schoolyard Alliance   www.sfgreenschools.org/

Kidsgardening.org   www.kidsgardening.com/
A project of the National Gardening Association.

Schoolyard Habitats   www.nwf.org/schoolyard/
A project of the National Wildlife Federation.

Learning Grounds, Evergreen   www.evergreen.ca/en/lg/lg.html
This link includes guidebooks for creating green schoolyards.

Harvest H2O   www.harvesth2o.com/resources.shtml
This organization has a good set of links about rainwater harvesting and water conservation, including some links to schools that have elaborate schoolyard rainwater collection systems, like this one at the DaVinci Arts Middle School in Portland, Oregon: www.harvesth2o.com/davinci.shtml

ADPSR — Architects / Designers / Planners for Social Responsibility   www.adpsr.org/
A green building organization, with chapters in the San Francisco Bay Area, Chicago, New York, and elsewhere.

New Village Press   www.newvillagepress.net/books.php
Publisher of "Asphalt to Ecosystems: Design Ideas for Ecological Schoolyard Transformation," a book about ecological schoolyards scheduled for publication in March 2009.