All you need to teach fourth grade spelling is in this one book. Improving Your Spelling Skills/Book 4 is the fourth in a series for first through eighth grade. It is a user-friendly workbook with exercises for daily work for the entire school year. It includes words with the short and long vowel sounds, vowel diphthongs, R-controlled vowels, silent letters, consonant clusters, irregular plurals, suffixes, contractions, and homophones. Every sixth lesson is a review of the previous five lessons. A glossary and answer key is also included.