Math reference books for second and third-year junior high school students. - Title: Watch and Understand: Math for Second Year - Title: Watch and Understand: Math for Third Year - Publisher: Try IT - Series: Try IT Tutoring Includes video lessons for all questions! Just scan the QR code with your smartphone! Thank you for looking! - No highlighting or folded pages. - There are some minor scratches, marks, and corner wear due to aging and storage. ⚠️ There were a few places with pencil markings in the third-year math book. I have erased them as much as possible, but some pages still have faint marks. (See images 7 before erasing → 8 after erasing) - The images are taken with lighting. The paper discoloration and minor scratches may not be visible, and the books may appear cleaner than they actually are. - For those who understand that these are used books, Thank you for your understanding.