Final answer:
Instructors request the use of email for personal matters to ensure professional and private communication about individual concerns, maintain a record of the conversation, and prevent the public discussion of private issues.
Step-by-step explanation:
Your instructor's request to use email for personal matters is likely based on the need to maintain a professional and organized communication channel. Usually, emails within a course setting should be reserved for questions and issues that are personal in nature, such as feedback on assignments or clarification on comments made by the instructor. This helps to ensure privacy and individual attention to specific concerns, keeping them apart from general classroom discussions which may be better suited for public forums like a class message board or group chat.
Instructors ask for email communication for private matters so that there is a record of the conversation that can be referred back to if necessary, and to prevent the public airing of issues that are relevant to only one student. This assists in managing the course more efficiently and ensures that each student receives the attention and discretion that personal matters require.