An easy way to do voting in the classroom is to use an online voting system that will do real-time voting and engage with your students. Mentimeter could be such a tool: https://www.mentimeter.com/.
You can register for the free option to start with and design your own questions. During the class make sure that students have a smart phone and wireless access. They will access your voting site with a unique PIN number, then they can vote real time. A little tip, I have found that it is better to hide the screen results while students submit their votes as they get influenced by the responses of fellow students …
Some of the core features can be accessed on this page and will depend of the version you use (free, basic or pro)
voting system
