1. using TV as a one-way communication student instructor was unable to moderate interactivity
2.Television, not as a substitute instructor, completely. Learners need to learn more lessons from other media components. Lessons on television by
3. potential barriers to communication, such as a power failure or the environment of the participant's. Keep lack of concentration to learn
4. Bill may not be good enough. The teaching is interesting as it should be
5.Need to have high expenses on purchasing equipment that can take place and uses the method to produce high quality items.
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