Answer Clicker is a free classroom response tool that serves as a free substitute for subscription-based clicker programs. Designed by a teacher, it is meant to be a quick low-tech option that can be used instantly in small sized classrooms who can't afford the more expensive classroom response tools. This app provides an excellent opportunity for teachers to perform an immediate comprehension check, while allowing students to demonstrate their learning in real-time. With the multiple-answer feature, teachers can easily build challenges into simple multiple-choice questions. The user-friendly interface is easy to navigate, with the ABCDE button selection and green check making it simple to use. Students can also use the question mark button to indicate an "I don't know" response. Give Answer Clicker a try and see how it can enhance your classroom experience!