I bought these and then my student decided to enroll in a different program. No marks the books. Like new! *You will need to purchase the Dimensions 7A Textbook and Workbook for your student as this listing is for the Workbook Solutions and the Teaching Notes books only.* Retail price is: $32 for the Teaching Notes and $19 for the Workbook Solutions From the Singapore website: Teaching Notes and Solutions is a succinct and useful tool for educators. It contains teaching notes for each chapter, and fully worked solutions for all problems in the textbook. Notes on Teaching for all chapters covered in Textbook 7A Fully Worked Solutions for questions in Textbook 7A Chapter 1: Factors and Multiples Chapter 2: Real Numbers Chapter 3: Introduction to Algebra Chapter 4: Algebraic Manipulation Chapter 5: Simple Equations in One Variable Chapter 6: Ratio, Rate, and Speed Chapter 7: Percentage Chapter 8: Angles, Triangles, and Quadrilaterals All copyrights reserved by Star Publishing Pte Ltd, Singapore.