Hand-held remotes, or "clickers", are a technological solution to providing more interactivity and timely feedback in the classroom. Clickers allow students to answer questions throughout the lectures, testing their comprehension at the time the content is being covered. Because student responses are totally anonymous, class participation is nearly 100%. As a result, students are more engaged. Class attendance increases. When students are allowed to discuss questions amongst themselves before submitting their answers, a collaborative learning environment is created. The technology also provides real-time assessment to the instructor, who can see instantly whether or not concepts have been clearly understood, and can address them when they haven't.