The last day(s) are as important as the first days of a course. Here are a few sites with great suggestions for finishing strong, whether in-person or virtually. 

It's A Wrap: Making the Last Class Memorable, Kennesaw State University Center for Excellence in Teaching and Learning

Parting Ways: Ending Your Course, Teaching Tips, Association for Psychological Science 

The Last Class Session, Maryellen Weimer, Teaching Professor Blog 

The end of the semester is an ideal time for reflection–for students and for instructors. Visit this Teaching Resources page for additional resources on the topic of reflection.