Lack of personal contact between teacher and student (there is less efficient, impersonal knowledge transfer). Also there is a lack of communication with fellow students to share experiences.
Lack of a student’s strong personal motivation and the ability to learn independently; without the constant support and prodding by a teacher. Student should have a number of individual psychological qualities, such as rigid self-discipline; learning result depends on the persistence and conscientiousness of a student.
Lack of a possibility of immediate practical application of knowledge, followed by discussion of emerging issues with the teacher and explanation the situation with the specific examples.
Online education usually is only in writing. For some people the lack of opportunity to express their knowledge in words can make negative impact on knowledge assimilation.
Knowledge and education are important in the life of every person, but there are different ways of obtaining them. As it was said above online course is a good way to get knowledge, but it is not convenient for everybody. People should choose the way of acquiring knowledge according to their personal skills and time they are ready to devote to studding.