This set provides practice in words with long vowels ending in a silent "e" and phonograms with long vowel sounds (such as "oe", "ee", "ea", "ai"). While my daughter was working her way through this set of books, we continued drilling the phonogram cards each day (in a somewhat Montessori style) and discussed spelling rules as they came up in the stories. By the time we got to the later books in this set, Jacinta was anxious (and fairly able) to start reading other types of books. We skipped the final book in this set and began reading the Primer from the Catholic National Readers.