With Nearpod (free app and browser-based site), you can create interactive presentations that can be seen simultaneously by others on their devices. You can add to your presentations quizzes, polls, videos and more:
Here’s a video explaining how the site and app work:
To create presentations, you do have to sign up, which you can do with Google or an e-mail address. To participate in a presentation, students don’t have to have accounts with Nearpod. They can sign in with the “session PIN number” you’ll get when you create a presentation.
With a free account, you can do the following:
To find out more, here are some guides (interactive), at the bottom of the How it Works page: