Reading guide features a transparent window to help guide young learners and allow them to efficiently navigate through sentences. Colored plastic allows the reader to see the contrast of words on the page to increase their concentration. Durable construction resists daily wear-and-tear for lasting use. Reading guide is perfect for preventing readers from skipping words, skipping lines, reversing letters, transposing letters, squinting and more.Reading guide features a transparent window to help guide young learners and allow them to efficiently navigate through sentences. Colored plastic allows the reader to see the contrast of words on the page to increase their concentration. Durable construction resists daily wear-and-tear for lasting use. Reading guide is perfect for preventing readers from skipping words, skipping lines, reversing letters, transposing letters, squinting and more.