Dual-Ruled Composition Book features two alternating ruling styles. The right-hand page offers a 3\/8" wide ruling for traditional note-taking while the left-hand page features a 1\/4" grid ruling to draw coordinating graphs, illustrations and interpretations. Note-taking in this manner engages both hemispheres of the brain. Durable, hard cover protects the 100 green sheets inside. Using colored paper has been shown to help students with dyslexia work through the impacts of this learning disability. Colors also allow students to organize by class, theme or semester.