Intended for student use at home as a supplement to schoolwork or at school as a phonics text, this workbook presents the irregular vowel sounds, including the vowel diphthongs, the r-controlled vowels, and other irregular vowel combinations. Each vowel or combination is presented in a lesson of two to six pages, depending on its perceived difficulty and frequency of occurrence. Lessons include practice in recognizing the vowel sound by using picture clues, rhyming words, and word meanings and by writing vowels in words and sentences. Review pages, which occur throughout the workbook, provide practice in discriminating the sounds of several vowels or vowel combinations. A general review of all the sounds is found at the end of the workbook. (MG)