Learning cards set provides a variety of ways to let your students practice & reinforce important time-telling skills. Grade-level appropriate problems help students develop a better understanding of time. Double-sided cards provide a perfect way for students to practice reading & comparing time, identifying time on digital & analog clocks, finding elapsed time & solving word problems about time. Cards are compatible with the Teacher Created Resource Power Pen (sold separately) for immediate feedback with an audio & visual response. Set is designed for children attending first-grade to fourth-grade.