Bichronous Online Learning: Blending Asynchronous & Synchronous Online Learning — from er.educause.edu by Florence Martin, Drew Polly and Albert Ritzhaupt

Excerpt:

Overall, research shows that when synchronous communication features are integrated with asynchronous features, the online course is more engaging, increasing learning outcomes, positive attitudes, and retention.

Bichronous Online Learning: Blending Asynchronous and Synchronous Online Learning