The selection of words and grade placement in this Series of Spellers were determined by the authors as a result of their own research work and a careful comparison of the words used in the numerous other Spelling Books now on the market as well as the various Standard Lists of Words, such as Ayers, Jones, Buckingham, Eldridge, Cook, and Nifenecker, representing scientific investigations of nearly 16,000,000 running words. This list, therefore, includes all the basic words that every child should know how to spell and write. In addition, the Series provides the child with exercises, rules, and various devices to develop the power to spell words correctly. (from how to use this book page) 93 pages