Many instructors are moving away from lecture and toward more collaborative learning. There are assorted pros and cons about this development, but now that virtually everyone has a hand-held device, it seems natural to search for a good way to use this technology in the classroom.
Please have a look at this article in Faculty Focus by Lloyd Willis, an associate professor of English at Lander University, in South Carolina. The author explains how using a couple of free Google applications can accomplish a great deal. He walks you through the steps to get started, and has already taken various pitfalls into account. You can tell he's been there, done that.
Practically everyone has a Google account already, but this is easily accomplished for those who don't. Some classrooms even have electrical outlets for each student, hence avoiding the low battery obstacle.
From the piece:
As is always the case, however, there is never a perfect solution. Some content must be delivered to the class, some students resist buying into a course that doesn’t directly contribute to their career training, and some students resist injecting themselves into classroom discussions whatever form they take.
My most recent strategy to combat these challenges has involved using Google’s Web apps, specifically Google Docs and Google Slides, to facilitate in-class discussions and collaborative projects. There are many Web apps, presentation platforms, and collaboration tools that are more elaborate and flashy, but the Google products are easy to use, with interfaces familiar to anyone who has ever used any word processing or presentation application. They are also free, and are universally available to anyone with virtually any type of smart device.
This seems doable for those who are interested. And it's free.