This Sadlier-Oxford Progress in Mathematics Teacher's Edition Grade K is a comprehensive textbook designed for elementary school students who are beginners in mathematics. It covers a wide range of topics in the subject area of homeschool mathematics. The book features 430 pages of teaching material and is authored by Alfred S. Posamentier and Catherine D. LeTourneau. The textbook is perfect for teachers who want to teach mathematics effectively to their students. It includes features such as teacher's edition, which provides additional resources and support for teachers. This book is an excellent choice for those who want to improve their teaching skills and help their students progress in mathematics.