Virtual courses – a synonym is online courses – are courses delivered on the Internet. "Virtual" is used here tocharacterize the fact that the course is not taught in a classroom face-to-face but through some substitute mode that can be associated with classroom teaching. That means people do not have to go to the realclass to learn.
Both the asynchronous and synchronous methods rely heavily on self-motivation, self-discipline, and ability for effective written communication. 
Although there is a long andvaried history of distance education, the current intersection of technology as a means to facilitate real-time communication with community-centered interaction, and the increasing acceptance andemployment of those developments in the broader culture, have positioned virtual schools in a position of significant innovation and responsibility. In an educational environment in which school choice forfamilies and students is valued, “cyber charter schools, as an outgrowth of the charter movement and the virtual school movement, represent a unique group of schools characterized by both theiradministrative model and their course delivery technology.”
Communication and interaction
Students in virtual education acquire knowledge in a uni-directional manner (e.g. by studying a video,reading a textbook chapter), this would be known as asynchronous instruction. Subsequent discussions of problems, solving exercises, case studies, review questions, etc. help the students to understand...