Marsh, D. (2012). Blending Learning in a Web 2.0 World: Creating Learning Opportunities for Language Learners. Cambridge University Press.
This booklet provides a short history of the term “blended learning” and traces its development from the notion in 2000 of simply supplementing classroom learning with self-study e-learning activities to its use today to mean any combination of different methods of learning, different learning environments and different learning styles. While not focused on ESL, it is a good resource to set the stage while providing practical guides and templates.