Structure is an integral part of a comprehensive and well designed online course. Structuring the online course to correspond to the number of weeks is critical. While there are generally 5 accepted types of lecture formats, the most effective with online classes are direct delivery, problem-solving, and graphics-based. 

The course content has to be engaging so as not to cause the student(s) to feel isolated and/or frustrated. It is important to use a variety of media to keep the student engaged. Integrating critical thinking questions afford the student the ability to apply the knowledge they've gained. And, lastly, don't discount the impact of guest lecturers in an asynchronous learning environment. If selected appropriately to the content being delivered, they help to reinforce the material and provide the student insight into real-world applications.

Quality online courses are characterized by:

1. Structural Integrity
2. Navigational Simplicity
3. Active Learner-Centered Learning
4. Intellectual Interaction

Absent any of these components, the online course may confuse learners, cause frustration and may not maximize their ability to retain the information presented.