Plickers is a formative assessment tool designed to be quick, easy, fun, and engaging. Plickers gives teachers and students immediate feedback. Teachers create questions and answer choices, so Plickers can be used with any content, and at any time. Plickers only require the teacher to have a cell phone or tablet with a camera, so only one device is required. Students are assigned unique bar codes and if they are printed on card stock they could last all year. When students hold up the cards, the teacher scans the entire room and responses are recorded immediately. Within seconds, the teacher knows exactly who is mastering a topic and who needs more instruction. The Plickers application costs nothing to use.