Nichinoken Summer Course for 4th Graders: Standard and Advanced. Includes answer keys. This material has all been cut. Regarding the Standard version: I have erased all pencil markings with an eraser. There are some pen markings, but I believe you can still use it without any problems. Regarding the Advanced version: There are many pen and pencil markings. I felt that the content was a slight level up from the Standard version, so I recommend using this version as a reference without erasing the markings. Please understand that this item has been handled by others before purchasing. Please purchase only if you understand how to use cut materials. The Standard version has a few torn pages, but there were no problems with scanning.