Amazon.com description: Product Description: The American Heritage(R) Children's Dictionary for children ages 9­12 contains 37,000 entries plus informative and useful special features such as synonyms, word histories, and vocabulary builders. This best-selling dictionary has been expanded for 1997 with a new section on phonics and spelling to help children build their spelling, vocabulary, and reading skills and to make it easy for parents and teachers to help children learn. A detailed guide to vowel and consonant sounds gives the most common spelling as well as many less common ones encountered in everyday reading. The section on word building demonstrates how to form simple compound words, how to use prefixes and suffixes, and how to understand word roots. This dictionary is a complete language reference for every child.