Links:
[1] http://www.edutopia.org/sara-ring
[2] http://www.edutopia.org/play-fun-school
[3] http://www.edutopia.org/creative-play-learning-part-one
[4] http://www.sltrib.com/education/ci_13179052
[5] http://www.boston.com/news/education/higher/articles/2009/08/30/pressure_cooker_kindergarten
[6] http://www.edweek.org/ew/articles/2008/11/17/14play.h28.html