I disagree that using avatar teachers is better than human teachers. Although using avatar teachers does not become sick like humans do, they are after all, machines. Machine teachers cannot be as good as real human teachers. In school, students does not only studies things that are in the textbooks, they also learn values and how to be an upright person. For example, when we fight in school or cheats, our teachers will scold us or give us detentions. An avatar teacher, however, does not do that. In addition, if we got too dependent on technology, these electronic stuffs, when one day there is a major power shortage, all of these will not function. Therefore, i think that using avatar teachers is not a good idea.
yu ze