Great resource book for anyone who teaches math. This book will give you a different view of mathematics and change the way you think about and teach math in the future. This book will introduce the fundamentals behind whole number operations. What would you say if I told you that you do not need to memorize 100 addition facts to be able to add? This may be accomplished by only memorizing 33 basic addition facts and 1 concept. Want to learn a conceptual approach that will help you understand the base ten numeration system and count? Want to learn conceptual approaches that will increase your speed and accuracy in addition, subtraction, multiplication, and division of whole numbers. Did you know that students taught under the United Kingdom Education System, subtract totally different then we do? They do not regroup/borrow as we do, and many students prefer it over our method.