1. Afterschool Alliance 2013 http://eric.ed.gov/?q=After+school+alliance+evaluations+backgrounder&id%20=ED539792.&id=ED539792
2. Evans A Leung B 2012 http://www.nasponline.org/publications/cq/index.aspx?vol=40&issue=8
3. After-school programs and academics: implications for policy, practice, and research;Granger;Soc Policy Rep,2008
4. Afterschool Alliance 2009 http://www.afterschoolalliance.org/documents/Afterschool_In_Brief_09_FINAL.pdf
5. Durlak JA Weissberg RP 2007 https://www.casel.org/s/the-impact-of-after-school-programs-that-promote-personal-and-social-skills.pdf