What face-to-face teaching activity is difficult to implement online?

[iitb-teachonline]

Think of one teaching activity you do in person in a face-to-face course, that you believe is difficult to do online. It could be about illustrating or explaining a concept, or answering student questions (course related or other). It could be a one-on-one conversation with a student who needs specific support. It could be what you do when you arrive for class early or stay back after class.  

1) Post your concern for what it is difficult to do online.

2) Go through others' posts. If you have an idea for an online strategy to address a concern, please contribute, especially if you have tried it.

[lahe....@gmail.com]

Sentiment Analysis of Students, Low Emotional Attachment in online mode, Hard to keep everyone attentive