There are two main ways instruction can be implemented in the online classroom.  It can be synchronous or asynchronous.  When you think of synchronous, think or in sync (not the group N’Sync) but in sync meaning together.  This method of instruction occurs when the student and the teacher or together in live communication with each other.  This can be in the form of  a live web conference, telephone and/or Skype conversation or instant messaging to name a few.

Asynchronous instruction means that the work is being completed and turned in by a certain due date, however, there is not an instant or live interaction occurring between the teacher and the student.  For example, an email in sent and may not be replied to until a few hours later or the next day.  Other forms of asynchronous tools include discussion boards, blogs, or wikis.