Notifications of absences, requests for reference letters, clarifications on assignments, and expressions of thanks for supervision on your thesis are common reasons for writing to instructors. Most professors use e-mail either within Brightspace or through other accounts. The syllabus or departmental website will provide you with the correct address. The general rules are keep your remarks concise and always be polite. Here are a few additional tips:
Subject: Missing Monday’s Class Due to Swim Meet
CC: Sam Sani, Teaching Assistant
Hello Professor Smith,
As we discussed at the beginning of the term, the swim team periodically travels to meets during the week. I will miss our Monday class (BUSI 340) because of a meet in Montreal. Since I have the syllabus, I will complete the readings and assignments before I leave, and I will send them to the marker electronically. Thank you.