This is a science textbook for sixth graders preparing for junior high school entrance exams, with answers and explanations included. I've quickly looked through it, and there are no markings. As a bonus, I'll include a check-up test. - Title: Junior High School Entrance Exam Shin-Enshu Science Grade 6 Summer Textbook - Answers/Explanations: With answers and explanations - Grade Level: 6th Grade - Subject: Science Please purchase only if you understand that this is a USED item and has been stored at home. Instant purchase is welcome. Thank you for looking.