iNacol Blended Learning Research... The best of both online and face to face for students.
K12 Online Learning Resouces and White Papers... Lots of information and resources on this page.
Keeping Pace with K-12 Online Learning... Annual Review of Policy and Practice (2010)
Edutopia... Research Roundup: Online Learning
How online Learning is Revolutionizing K-12 Education and Benefiting Students... The Heritage Foundation- .pdf
Seven Myth Busters of Distance Learning - For students and teachers.
10 Thinks I've Learned About Teaching Online - Michelle Everson, eLearn Magazine
"The Realities of K-12 Virtual Education" by Gene Glass from the Arizona State University (April 2009). PDF of paper can be found at http://bit.ly/49V4UJ <http://bit.ly/49V4UJ> .
Interesting article about online learning and the evaluation of learning materials. TxVSN will use the iNACOL standards to evaluate your courses, but this might also prove to help as a checklist:
http://www.isteconnects.org/2009/10/30/evaluating-course-equivalent-online-learning-environments/
Synchronous Training Articles by Members of the InSync Training Team
http://www.insynctraining.com/articles.htm