References

Gray, P. (2013). Free to Learn: why unleashing the instinct to play will make 
          our children happier, more self-reliant, and better students for life. 
          New York, NY: Basic Books.

P21. (n.d.). Case Study: A. L. Stanback Elementary School. 
          http://www.p21.org/exemplar-program-case-studies/1262-case-study-al-
          stanback-middle-school-part-1

P21. (n.d.). Case Study: Genesee Commuinty Charter Expeditionary 
          School. Retrieved from http://www.p21.org/exemplar-program-case-
          studies/1310-genesee-community-charter-expeditionary-school

P21. (n.d.). Case Study: Katherine Smith Elementary School. Retrieved
          from http://www.p21.org/exemplar-program-case-studies/1623-case-study-
          katherine-smith-elementary-school

StartClass. (2016). A L Stanback Middle in Hillsborough, North Carolina. 
          Retrieved from http://public-schools.startclass.com/l/67158/A-L-Stanback-
          Middle

StartClass. (2016). Genesee Community Charter School in Rochester, New 
          York. Retrieved from http://public-schools.startclass.com/l/60667/
          Genesee-Community-Charter-School

StartClass. (2016). Katherine R Smith Elementary in San Jose, California. 
          Retrieved from http://public-schools.startclass.com/l/8184/Katherine-R-
          Smith-Elementary

Sudbury Valley School. (n.d.) Sudbury Valley School: The cutting edge school 

          for independent children. Retrieved from http://www.sudval.com/