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Graham defines blended learning systems as combinations of face-to-face instruction and computer-mediated instruction, then examines why such combinations were becoming increasingly common. The definition is deliberately broad because blends vary in level, proportion, sequence, purpose, and technology.
The chapter distinguishes blends at activity, course, programme, and institutional levels and identifies three common purposes: improving access and flexibility, improving pedagogy, and increasing cost effectiveness. It traces convergence between historically separate face-to-face and distributed-learning environments and illustrates models ranging from enhancement of classroom teaching to substantial transformation of time, place, participation, and interaction. The central design challenge is not adding an online component but combining environments so their affordances complement one another and weaknesses are addressed. Because “blended” can describe almost any contemporary course, evaluation requires specifying what is combined, for whom, why, and with what outcomes.
The framework supports intentional alignment among goals, activities, presence, media, learner support, and assessment rather than assuming a particular ratio produces better learning.
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