The Dimensions Math Home Instructor's Guide 2B is a spiral-bound book by Singapore Math Inc. specifically designed for teacher use to guide them in teaching math concepts to students. The book is written in English and provides detailed instructions for instructors to help students learn and understand mathematical concepts effectively. With its spiral-bound format, the book allows for easy reference and quick access to specific pages and exercises. Published by Singapore Math Inc., this guide is a valuable resource for educators looking to enhance their students' math learning experience.