Workbooks extend practice to reinforce and consolidate information covered in textbooks. Colorful and compelling activities make this essential part of the learning process fun for students. Note: Two workbooks (A and B) for each grade correspond to the two halves of the school year. Answer key not included. Soft cover. Grades PK-2 Workbooks are perforated. A & B Books: Our programs divide the school year into two semesters. “A” level books are for the first half of the school year. “B” level books are for the second half of the school year. You need both “A” and “B” material for a complete school year. Required Components: Textbooks, Workbooks, and Guides (either Home Instructor’s Guides or Teacher’s Guides) are all necessary components. These three elements each serve a unique function and work together to build math mastery. Table of Contents: Chapter 7: Numbers to 20 - Chapter 8: Number Bonds - Chapter 9: Addition - Chapter 10: Subtraction - Chapter 11: Addition and Subtraction - Chapter 12: Numbers to 100 - Chapter 13: Time - Chapter 14: Money