Nearpod is a free iOS app that teachers can use to create quizzes, polls, and multimedia presentations. Those materials can be shared directly to students who have the Nearpod student app installed. Teachers can view students' responses individually or as a whole class.
Applications for Educators:
Nearpod could be a good tool for teachers to create and deliver customized content to their students. The feedback mechanisms may allow you to quickly get a sense of your students' comprehension of the lessons that you deliver.