In CEE300 we use an explicit protocol that exploits multiple channels for communications, without adding confusion..

When selecting a channel, students and I must know two things:

1. The privacy of the communication, and
2. The urgency with which a response or action is requested.

Read more on Medium here:
https://medium.com/productivity-revolution/communications-in-the-digital-age-is-confusing-adf1d6f8542d?source=friends_link&sk=57a8564fac48b15149b3179a4191f07e