Children & Nature Network: its goal: establishing a global community of people and organizations committed to working together to reconnect children with nature
EIC: Using the Environment as an Integrating Context (EIC) for Learning; EIC is an education model that employs natural and community surroundings as the context for learning while taking into account “best practices in education.”
Globe Project: Uses a worldwide community of students, teachers, scientists, and citizens working together to better understand, sustain, and improve Earth's environment at local, regional, and global scales. Friendly website.
Environmental art: great UK site showing children creating natural art following Andy Goldsworthy's ideas. Make sure to follow the link at page bottom.
Fast Growing Trees: Great site for people who want well-established natural playgrounds in a hurry!
Fast plants: fast-growing plants for research and education purposes, vetted by the University of Wisconsin
Fencing: Unobtrusive, do-it-yourself fencing that is just the thing for child care centers wanting to avoid unattractive chain link fences.
Ground Covers: Great little brochure about ground covers: a plant list and info about where to plant, foot traffic tolerance, speed of growth, and growing conditions
Garden Community Gardening for people of all ages, abilities and lifestyles
Grass (self-replicating!!!), an answer to tough-use areas?
Green Pages (same as Yellow Pages, but about "green" companies)
Greening Schools - Students excited about their Natural Playground may broaden their interests to other sustainable School projects and check out this website.
Green Street: fascinating Canadian Site; well done!
Herb Gardens: Starting a garden for kids, growing, ideas, resources. Nice site.
Hidden Harvest: This award- winning, non-profit group teaches gardening in low income areas!
Playground Physics (and other resources) introduction to basic concepts in classical mechanics for upper elementary and middle school grades (4-7) relating the experience children have on the playground to basic physics concepts. Some refit req'd to use items that are all natural.
Societies: a comprehensive list of plant, garden, & related societies
STEM Lesson planning guide for K-12: STEM lessons can help introduce elementary students to "scientific linear thinking, creative problem solving, inventiveness, and instilling the importance of collaboration and teamwork," according to TODAY.com. For high schoolers, who have more freedom to choose specific electives and who are often beginning to think about their future careers, exposure to STEM can offer useful hands-on experience.
Sustainable Horticulture: UNH's Growing a Green Generation horticulture curriculum for pre-school to kindergarten age children
Training in Natural Play: outdoor play training courses at the University of Gloucestershire may be a bit of a stretch, but at least it's being done!