20 years!i-structures

Structure of the course and the lessons

3. One lesson, three levels

How many web pages will a student read before getting bored ?

In order to keep each lesson of the course short, the material must be organized in a manner different from normal course material. The structure proposed for the course has three levels:

Level Description Amount of material (HTML pages) Used by
1 Main points of the lesson 5 to 7 pages All students
2 Additional information about the lesson,
theoretical developments detailing
the content of the lesson		 Up to 15 pages A large number of students, who have understood the main material, if they want to know more
3 Reference material.
Could be a reference to printed text,
or an extensive on-line version
of the course documents		 unlimited A few students, who really want to expand on the basic knowledge presented in the course
 

Why is it important that the material presented in level one of the course be limited to less than 7 pages?  
To limit the costs of production of the course
Because of technical limitations in the web publishing system
To ensure that the attention of the students is maximal when learning the main course material

Please answer the question