Webster's Dictionary for Students, Fifth Edition. Our Best-Selling Dictionary for Students! This updated and expanded dictionary was created for students in grades 3-6. An age-appropriate word list and kid-friendly definitions make it a favorite of teachers, students and parents. 37,000 definitions of words kids use every day. Definitions written in clear, easy to understand language. This North American edition has Canadian words and spellings. Bundle of 6 Dictionaries.