Two important reference books are combined in one volume covering the core vocabulary students in grades 3-6 need. This is an ideal tool for homeschooling, classroom use, or general study.
Merriam-Webster's Dictionary and Thesaurus (Paperback)
Merriam-Webster's Dictionary of Basic English (Paperback)
Webster’s American English Dictionary
Webster's All-in-One Dictionary & Thesaurus, 3e (Hardcover)