Ray's New Primary Arithmetic introduces the four operations of addition, subtraction, multiplication, and division, along with counting and other basic skills. It can be used to guide your teaching for about two years - through grades 1 and 2. While the content may be considered more advanced than typical second grade math, many students are able to use Ray's mental system to complete the work. This book is the first in the Classic Ray's Arithmetic series. 96 pages, Paperback.