“Running Free in Germany’s Outdoor Preschools,” New York Times, May 18, 2017.
“Preschool without walls,” New York Times, Dec. 29, 2015
“You Can’t Bounce Off the Walls if There Are No Walls: Outdoor Schools Make Kids Happier–And Smarter,” David Sobel, Yes Magazine, March 28, 2014
“Look, Don’t Touch,” David Sobel, Orion magazine, July 2012 http://www.orionmagazine.org/index.php/articles/article/6929
Children and Nature Network, http://www.childrenandnature.org/
Sir Ken Robinson, http://sirkenrobinson.com/ and http://www.youtube.com/watch?feature=player_embedded&v=zDZFcDGpL4U
School’s Out: Lessons from a Forest Kindergarten: http://www.schoolsoutfilm.com