More than 1,000 photographs and illustrations, word histories, sample sentences, pronunciation guides, up-to-date technology references. Entries and definitions have been written by prominent lexicographers and reviewed by an advisory board of educators and librarians. Bonus materials include a thesaurus and specifically commissioned endpaper maps. With exciting features, accessible definitions, and helpful illustrations and photographs throughout, this updated dictionary is an essential resource that belongs in every classroom and library. Hardcover. 10-1/4" x 8-1/4". 864 pages. Grades 3-7.