Interpersonal communication takes place in several modes and by different channels.
This can be a bit complicated with big classes so you will likely be more successful if you choose a channel that is suitable to a mode. Well, two of the key modes are based on whether the information sought is public or private. Evidently, the newsgroup is better suited to public information and e-mail is suited to private information. Lectures Class lectures are the primary source of material for the course. All students are expected to attend.