Shieh E., Responsive urban Environment for children, case study, Tehran, Shahr publication, 2006.  Li L.H., Value of stigma – impact of social housing on private neighborhood, The Appraisal Journal, Vol.3, 2005, pp.305–317.  Maxwell L.E., Home and school density effects on elementary school children: the role of spatial density, Environment and Behavior, Vol.35, No.4, 2003, pp.566–578.  Evans G.W., Saegert S. and Harris R., Residential density and psychological health among children in low-income families, Environment and Behavior, Vol.33, No.2, 2001, pp.165–180.  McDevitt T.M. and Ormrod J.E., Child Development and Education, New Jersey, Merrill Prenticen Hall, 2002.  Olds A.R., Psychological and Physiological Harmony in Child Care Center Design, Children’s Environment Quarterly, Vol.6, No.4, 1989, pp.8-16.  Biddulph S., The secret of happy children, in: Monazah F., (Ed.), third publication, Peyke Bahar, 2005.  Pyle R., Eden in a Vacant Lot, Special Places, Species and Kids in Community of Life, Children and Nature: Psychological, Sociocultural and Evolutionary Investigations, in: Kahn P.H. and Kellert S.R., (Eds.), Cambridge, MIT Press, 2002.  Chawla L., Editors' Note, Children's Environments, Vol.11, No.3, 1994.  Moore R., Countering children's sedentary lifestyles by design, Natural Learning Initiative, 2004.  White R. and Stoecklin V., Children's Outdoor Play & Learning Environments, 2004.  Brooks D., On Paradise Drive: How We Live Now (and Always Have) in the Future Tense, New York, Simon & Schuster, 2004, pp.142-143  Hart R. and Raver A., Tutored by the Great Outdoors at a Southern Pines Playground, New York Times, 1999.  Kellert S.R., Experiencing Nature: Affective, Cognitive, and Evaluative Development, Children and Nature: Psychological, Sociocultural, and Evolutionary Investigations, Cambridge, MA: The MIT Press, 2002.  Hofferth S.L. and Sandberg J.F., Changes in American Children's Time, 1981 -1997, Center for the Ethnography of Everyday Life, Available at: psc.isr.umich.edu/pubs/., 2004.  Tomkinson G., Leger A., Olds T. and Cazorla G., Secular trends in the performance of children and adolescents (1980–2000):an analysis of 55 studies of the 20m shuttle run test in 11 countries, Sports Medicine, Vol.33, No.4, 2003, pp.285–300.  Bunting T.E. and Cousins L.R., Environmental dispositions among school-age children, Environment and Behavior, Vol.17, No.6, 1985.  Sobel D., Connecting Classrooms & Communities, Great Barrington, Place-Based Education, MA: The Orion Society, 2004.  Wilson R.A, Starting Early Environmental Education During the Early Childhood Years (ERIC Digest), Columbus, OH: ERIC Clearinghouse for Science, Mathematics and Environmental Education (ERIC Identifier ED 402147), 1996. جمالالدین مهدی نژاد و همکاران 318 نشریه علمی پژوهشی فناوری آموزش، سال ششم، جلد 6 ،شماره 3 ،تابستان 3313  Chawla L., Children's Concern for the Natural Environment, Children's Environments, Vol.5, No.3, 1988.  Phenice L. and Griffore R., Young Children and the Natural World, Contemporary Issues in Early Childhood, Vol.4, No.2, 2003, pp.167-178.  Veitch J., Where do children usually play?, A qualitative study of parents’ perceptions of influences on children’s active free-play, Australia, Health & Place, Vol.12, 2006, pp.383–393.  Fishman L., Child's Play: An empirical study of the relationship between the physical form of schoolyards and children's behavior, 2004.  Brown P.S., Sutterby J.A. and Thornton C.D., the “Ideal” Outdoor Manufactured Play Environments, Children’s Institute for Learning and Development, 2001.  Kytta M., Children in Outdoor Contexts: Affordances and Independent Mobility in the Assessment of Environment Child Friendliness, Doctoral Thesis, Helsinki University of Technology, 2003.  Heft H., Affordances of Children’s Environments: A Functional Approach to Environmental Description, in: Nassar J.L. and Preiser W.F.E., (Eds.), Directions in PersonEnvironment Research and Practice, Aldershot: Ashgate, 1999.  Prescott E., the Physical Environment and Cognitive Development in Child-care Centers, in: Weinstein C.S. and David T.G. (Eds.), Spaces for Children, New York, Plenum Press, 1987, pp.73-87.  Wells N., Evans M. and Gary W., Nearby Nature: A Buffer of Life Stress among Rural Children, Environment and Behavior, Vol.35, No.3, 2003, pp.311-330.  Faber Taylor A., Kuo F.E. and Sullivan W.C., Coping with ADD: The surprising connection to green play settings, Environment & Behavior, Vol.33, No.1, 2001, pp.54-77.  Evan J., Rethinking Recess: Signs of Change in Australian Primary Schools, Education Research and Perspectives, Vol. 24, No.1, 1997, pp.14-27.  Fjortoft I., The Natural Environment as a Playground for Children: The Impact of Outdoor Play Activities in Pre-Primary School Children, Early Childhood Education Journal, Vol.29, No.2, 2001, pp.111-117.  Grahn P., Martensson F., Llindblad B., Nilsson P., and Ekman A., UTE pa DAGIS, Stad & Land nr, 93/1991 Sveriges lantbruksuniversitet, Alnarp, 1997.