Grade-level appropriate problems help children develop multiplication skills ,Content provides perfect way to practice working with numbers, Compatible with Teacher Created Resource Power Pen (sold separately), Designed for children attending 2nd-grade to 5th-grade. 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