Developmental Mathematics Instruction Guide, Level 3. Ones: Subtraction Concepts and Basic Facts

To help educators and parents monitor the student's course of study, each of the lower levels is accompanied by an "Instructor's Guide", specifically written to advise the educator or parent of how a particular level fits as an integral part of the Developmental Mathematics program. Unit by unit, we examine the educational outcome. Lesson by lesson, we explain the mathematical content and the methods used to teach it. Page by page, we discuss the content presented and give the answers to each question and exercise.