Correspondence courses have little or no interaction between a student and the instructor. They also have little or no interaction between the students. Communication between people is an essential part of school. Every class has an instructor and students can always 'talk' to an Instructor during class. The very process of typing a question or a response involves the student in a much deeper way in the thinking process.
Many students find they are more effective learners when they take courses over the Internet.
The medium removes boundaries between people and every student is received without any preconceived notions due to image, appearance, disability, gender or anything else that separates people. Many students are able to function much better without thinking people are making judgments about them. Course selection is another important consideration. Many schools cannot offer all the classes requested by their students. This is a reasonable and responsible fact of life based on limited enrollment and fiscal constraints.