References

Calvani, Antonio; Cartelli, Antonio; Fini, Antonio; Ranieri, Maria (2008): Models and Instruments for Assessing Digital Competence at School, Journal of e-Learning and Knowledge Society - Vol. 4, n. 3, September 2008 (pp. 183 - 193)

Limniou Maria; Roberts David; Papadopoulos, Nikos: Full immersive virtual environment CAVETM in chemistry education, Computers & Education 51 (2008), pp. 584–593.

To find further reading, we suggest looking at the following useful source for articles:
http://www.irrodl.org/, where we found e.g.:

Research and Practice in K-12 Online Learning: A Review of Open Access Literature Cathy S. Cavanaugh, Michael K. Barbour, Tom Clark (Vol. 10, No 1(2009))

Abstract
The literature related to online learning programs for K-12 students dates to the mid-1990s and builds upon a century of research and practice from K-12 distance education. While K-12 online learning programs have evolved and grown over the past decade, the amount of published research on virtual schooling practice and policy is limited. The current literature includes practitioner reports and experimental and quasi-experimental studies, both published and unpublished. This paper reviews open access literature in K-12 online learning and reports on a structured content analysis of the documents. Themes in the literature include steady growth and a focus on the benefits, challenges, and broad effectiveness of K-12 online learning. In addition, newly developed standards for K-12 online learning are emerging in descriptions of effective practices.

Keywords
K-12; open source; online education

Other useful links:

http://www.ictliteracy.info/K12-Resources.htm