Classroom response systems, also known as clickers, can be used for learning, assessment, and engagement in the classroom. They allow teachers to conduct polls, quizzes, and questions to gauge whole class or individual understanding, provide instant feedback, and track student progress over time. Clickers come in different hardware brands and software systems, and can be used across subjects like math, science, social studies and language arts for activities such as lectures, group work, games, and reviews.