From the publisher:

This workbook builds on the phonics rules previously presented and instructs children how to spell words with beginning consonant sounds, consonant blends, consonant digraphs, vowel digraphs, diphthongs "ou" and "ow"; words with "ar" and "or"; word endings; words with "er," "ir," and "ur"; and diphthongs "oi" and "oy." Vocabulary-building is emphasized through contextual exercises; word-bank, crossword, fill-in-the-blank, and other exercises are included to help students gain familiarity with how words and sentences are constructed.

Test sheets are included at the back of the book. With 36 units and 5 lessons per unit, the text is designed to be used daily over a 36 week period.