26 Pack Composition Number Line Dry Erase Boards Cards 13.7”x4” Double Sided Writable and Erasable Board -10-10 on One Side 0-20 on Other Side for Students Classroom Home Whiteboard Math Manipulatives

["Number line boards cards: you will receive 26 pieces of composition number line dry erase boards cards, each card adopts a double-sided design: one side prints numbers 0 to 20, and the other side covers -10 to 10, perfect for students to practice adding and subtracting negative numbers.","Composition design: the double sided dry erase board card features classic composition notebook elements, the eye-catching design can effectively enhance students' interest in learning math; each whiteboard card is about 13.7 x 4 inch, providing ample writing space for a variety of educational, games or activities.","Writable and erasable: the reusable number line board has a smooth surface that allows write on and wipe off easily, these cards are lightweight and portable, so students can easily carry them between home and school, making them an ideal learning tool for the classroom, home or school.","Quality material: the number line board cards are made of thickened premium cardboard, sturdy and lightweight, with double sided laminated film, clear printing and bright colors, not easy to break, fade or bend, and the smooth round edges prevent scratches, making them a ideal math learning tool for students.","Great math learning tool: the dry erase number line boards are essential learning tool for teaching and practicing basic math skills, they allow students to complete homework and engage in independent learning at home, suitable for classroom and home use, they also make a thoughtful gift for educators and parents."]