Demonstrate essential math concepts…with a jumbo-sized magnetic chart that looks just like graph paper! Permanent 1" grid lines make it super-easy to draw graphs, arrays, area models, line plots and more. Plus, with its conveniently designed write & wipe surface, this versatile chart can be used again and again from year to year. Just place it on a magnetic surface and you’re ready to go! Chart measures 22" x 28". Write & wipe markers sold separately.