1. An Overview of Evaluative Instrumentation for Virtual High Schools
2. The impact of computer-based secondary education.;T. H.Blaylock;Education,2005
3. Carpenter, D., Kafer, K., Reeser, K., & Shafer, S. (2011). Summary report of the operations and activities of online programs in Colorado. Retrieved from http://www.cde.state.co.us/onlinelearning/
4. Web-based Instruction in a Rural High School: A Collaborative Inquiry into Its Effectiveness and Desirability
5. Exploratory study of the relationship between self-directed learning and academic performance in a Web-based learning environment.;P.-N.Chou;Online Journal of Distance Learning Administration,2008