Classroom items are essential for students to have in order to learn effectively. An ERASER is a tool used to remove mistakes made with pencils or other writing utensils. It is typically made of rubber and is usually 6 letters long. A NOTEBOOK is a collection of paper sheets bound together, often used for taking notes or writing down ideas. It is 8 letters long. A pencil sharpener is a device used to sharpen pencils so that they can be used more easily. It is 15 letters long.