I taught in a technical college where all students were issued laptops (paid for in fees). I was given extensive training how to integrate the laptop technology in teaching. While the laptop was a great aid in teaching, many of my students would use their laptops during class to surf the net, read their e-mails, play games etc. I finally had to have students close their laptops during most of class so they paid at least some attention.
My college student sons are appalled by the extent to which fellow students spend class time on their Ipads, and even moreso at most of the profs’ failure to insist they be turned off. Good for you for having them turned off.