Journal EDU540

1.http://www2.uwstout.edu/content/lib/thesis/2002/2002omanj.pdf 2.http://repository.tamu.edu/bitstream/handle/1969.1/ETD-TAMU-2008-12-97/JOHNSTON-THESIS.pdf?sequence=2 3.http://www.jae-online.org/attachments/article/1539/52.1.Complete_Issue.pdf#page=144 4.http://www.ascd.org/ASCD/pdf/journals/ed_lead/el_196905_schuck.pdf