Chart a course of action! Spark student interest with interactive, versatile charts. Reusable surface for customizing activities, projects, and presentations. 6-chart pack includes: Notebook Paper, Index Card, Graphing Grid (Small Squares), Graphing Grid (Large Squares), Music Staff Paper, and Handwriting Paper. 17" x 22" each; learning activities on every chart back. For best results, use with TREND Wipe-Off® Markers (T98003 and T98004). Writes easy ... wipes clean. They´re perfect for all Wipe-Off® products and most reusable surfaces. Wipe-Off® Markers have low odor, nontoxic ink with a durable medium-point tip.