Acrylic Ergonomic Writing Slant Board Transparent Plastic Preschool Slope Board Classroom Tool for Drawing Reading, Art, and Improving Handwriting Legibility. Quality and Transparent Acrylic Material: this writing slope board is made of quality acrylic material, with durability and longevity, easy to clean; The transparent design not only gives it an elegant and modern look but also allows you to see through it while writing.