• There are too many spam callers. No one wants to be on constant phone alert because too many times it is an unwanted caller. 
• Robocalling is taking over phone calls and you often can’t tell. Listen to this episode on “Reply All,” a fab podcast that explains this.
• Teachers are busy working. They don’t want others disturbed by a phone ringing.
• It is rude to answer a call when you are in the company of friends, family, or colleagues.
• Teachers are modeling good behavior.

When a person sends a text instead of a call, the recipient can find an appropriate time to respond to the text. If necessary, they can schedule mutually good time for a call.

If you are answering calls while you are at work or with others, don’t do it. It is rude. The same is true for texting. Do this when you are not in the company of others.

Of course there are exceptions to this. Maybe you’re wife is pregnant and you know she may be going into labor. Perhaps your friend is having surgery and you are expecting a call from the doctor. You know, emergency-type stuff.  

However, as a regular habit, the proper protocol is to have the ringer off, the phone away, and be present with those in your presence.