Key Work Science Year 3 with Color Reference Book Received from W Academy. Material with test preparation and explanations useful for science learning. Highlighter marks on problem numbers and circles drawn with a pencil. There is a calculation in the margin on only one page. Please check the photos. There are no written characters, but I apologize if I have overlooked anything. This item has been stored at home. We ask for purchases from those who understand that this is a used item. If it is possible to combine with other items I am listing, I will offer a discount equivalent to the shipping cost. For regular test preparation!! (Internal grades are important for high school entrance exams)