Engage your students in active learning with the beneficial features of this power pen. Pen is designed for use with math and reading comprehension cards (sold separately) to build skills and reinforce lessons. With the easy-to-use design, children will simply select an answer and receive immediate feedback. Plus, the audio and visual response sends positive messages to correct answers and encourages redirection for wrong answers to keep students motivated and on track. Power pen requires two AAA-size batteries (sole separately).