Presentation.io is a neat service that allows you to share your slides to your audience members' mobile devices and remotely control the transitions of the slides on their devices. It is a nice way to make sure that all of your students are on the same page with you. Unfortunately, Presentation.io was recently acquired by Cisco and is going to shut down on September 1, 2014.
Nearpod is a good alternative that you might want to consider using. Nearpod is available for Android, iOS, and Windows mobile devices.