Nowadays almost everybody uses such devices almost every time! Particularly during my lectures in the class I can see some students who are working with their iPads and mobile phones. In such a situation I usually think about two possible situation and two possible reactions as follows:
The student is searching in the internet for more information about what I am teaching.
In this case Good Saint Georg's reaction could be:
Waiting for a possibly good question by that student which is an opportunity to introduce new aspects of the teaching material.
The student is doing something unrelated to what I am teaching.
In this case Evil Saint Georg's reaction could be:
Declaring loudly to all students that "Shut down your devices or get out of my class!"
Question: What is a wise strategy about students iPads and mobile phones in class during my lectures? Should I remove the problem by banning all students to bring any devices to my classes or there are more soft ways to manage this situation?