Greetings!
I invite you to contact me as issues arise in your course. I can't emphasize it enough how important consistent communication is between students and their professors. Many times, a student has come to me already thinking the worst only to discover a solution. So do reach out, even if it's just for a cup of coffee.
And please remember...
The only way to contact Professor Rosenberg is via this website ("Contact," above).
Sending messages to Professor Rosenberg, or replying to his comments, on the Learning Management System (Canvas, Blackboard, etc.) is not allowed.
Emailing the professor is not allowed.
Leaving voicemail is not allowed.
Leaving written communication of any kind in his mailbox, office, or anywhere else on the planet is not allowed.
Leaving messages for him with university personnel (deans, secretaries, mascots of any species, other members of faculty, etc.) is not allowed.
Etc.
Again: the only way to contact Professor Rosenberg is via this website ("Contact," above).