"The Policy Brief reviews the functionalities of learning platforms and analyzes reasons to cause and accelerate diversification of learning platforms in terms of changes in learning content, variety of learning software, and transformation of ICT environment. Whereas in the past learning platforms used to be focused on simple delivery of content, current learning platforms utilize distributed learning resources and tools as competitive advantages in which teachers and learners can compose and control their learning activities on diverse learning devices in an unrestricted physical environment. The Policy Brief describes key challenges and limitations for adopting learning platforms, and recommends to consider changes in learning platforms and technologies as a continuous phenomenon." (Back cover)