School supplies are essential items for students of all ages. ERASER is a common school supply used to erase mistakes made while writing or drawing. It is usually made of rubber or plastic and is available in various sizes. BINDER is a type of folder used to store documents, notes, and other materials. It is usually made of cardboard or plastic and has rings that allow the user to add or remove pages. Chalks are sticks of colored chalk used to write on chalkboards or other surfaces. They come in various colors and can be used to create drawings or write messages.