With a site as large as TKDTutor, I needed a way for users to easily navigate to and view the articles. To accomplish this, I created an article Index using the following hierarchy:
Group (it contains a list of groups, each with a list of subjects related to the group).
Subject (it contains a list of topics related to the subject).
Topic (it may contain a list of articles related to the subject or it may be subdivided into subtopics).
Subtopic (it may be used in topic lists to add another level to the hierarchy; it contains a list of articles related to the topic).
Heading (it may be used in topic or subtopic lists to differentiate the articles).
Subheading (it may be used in topic or subtopic lists to further differentiate the articles).
Article (This is the final destination).
Each group, subject, topic, and article link includes a short description of its content to help the user know what's in the article.