Service Alert
If you can't meet in person, consider a virtual replacement. These tools can enable office hours, an exam review session with an instructor or a TA, or even student presentations to happen virtually: schedule a session in advance and let your students know when and where to "meet up" virtually.
Here are instructions on how to record a Google Hangout if you would like to do so, using the premium feature available to all G Suite for Education accounts until July 1st.
You can use these tools for asynchronous discussions and feedbacks sessions, to replace face-to-face versions of these activities.