Education Week 

Just as the model of blended learning is pulling the worlds of virtual and brick-and-mortar schools together, new theories within virtual learning are bridging the divide between synchronous and asynchronous instructional methods. Online educators say they once debated whether to deliver courses synchronously, by allowing access to instruction during a given time, or asynchronously, by allowing access anytime and anywhere. Now, they are designing approaches that meld both methods.

Full story