In the four-quadrant format of MOOCs, which of the following facilitates interactions among learners and course coordinators?

In the four-quadrant MOOC format the discussion forum is the space where learners and course coordinators interact, post questions and reply to one another.

The video quadrant delivers recorded lectures for learners to watch, which flows one way only.

The assessment quadrant tests understanding through quizzes and assignments rather than open discussion.

The reading-material quadrant supplies notes and references to study, again without two-way exchange.

Only the forum supports the back-and-forth communication the question asks about.

The four quadrants are commonly the e-tutorial, the e-content, the self-assessment and the discussion forum.