Learning cards set provides a variety of ways to let your students practice and reinforce important math skills. Grade-level appropriate math problems help students develop a better understanding of multiplication. Double-sided cards provide a perfect way for students to practice multiplying numbers horizontally and vertically, whole numbers, single-digit numbers and double-digit numbers. Cards are compatible with the Teacher Created Resource Power Pen (sold separately) for immediate feedback with an audio and visual response. Set is designed for children attending second-grade to fifth-grade.