Online Expert as subject specialist:-
In many condition the teacher will be asked to role as a specific subject expert, sometimes acting as the most important source of content but, more likely, acting and supplementing as a backup to content that is accessible elsewhere.
Presenting
In many online courses, most of the content is accessible in the form of self-study materials. The tutor may have play vital role in the preparation of these.
In other cases, the subject specialist may need to present information in a synchronous, real-time situation.
Demonstrating:-
With definite types of expertise, whether psychomotor or cognitive, it will be necessary for tutor to provide a demonstration. This may be offered as a resource for live event or as part of a self-study.
Online Expert as a trainer:-
There will be several times when the subject expert will need to act as a trainer, helping to make easy learning rather than presenting comfortable straight. This role is mainly important in an online tutoring where students may be working for long time periods on their own project.
Online Expert as evaluator
With many of online courses, assessment is essential to the self-study materials. In other cases this may be neither feasible nor pleasing and the tutor will be necessary to perform an assessment of the nature and extent of the learner's understanding and skills.