An Article by David Nagel suggests that: 
Despite increasingly widespread adoption of technologies in virtually every aspect of K-12 education, significant challenges are preventing widespread effective implementation. According to researchers, though some of those challenges are systemic and some related to the technologies themselves, teachers and education leaders share in the blame as well.
“The NMC Horizon Report: 2013 K-12 Edition,” put together by the New Media Consortium as part of the Horizon Project, identifies key emerging issues in education technology using primary and secondary research and input from an advisory board comprising “internationally recognized practitioners and experts” in ed tech. Among those issues are challenges that represent significant constraints on the adoption of technology in education. Full Article