Used in part. ◯ The 10 pages with blue sticky notes were written only in pencil, so I erased them with an eraser, but they are not completely clean. See photo 4. ◯ The 3 pages with pink sticky notes were written in pencil, and then my child added circles and comments in red pencil. The pencil marks were erased, but the red pencil marks could not be removed. See photos 5-7. Other than the above, I think it's clean. Thank you for looking.