synchronous

Synchronous adj : instructor’s delivery of online course content and participation by online students occurs at the same time.

For those who opt for a synchronous distance learning course, the experience is very similar to the traditional classroom one: instructors and students meet at a scheduled time at a predetermined [virtual] location, and interaction is instantaneous. With this type of online course, educators rely on technology such as video conferencing, chat rooms, webinars, and phone conferences.