The 80 books in this series (20 per level) cover the full range of phonics skills---from short vowels (Level A), to short vowels with blends and digraphs (Level B), to long vowels and diphthongs (Leverl C), to complex vowels and multisyllabic words (Level D).These books provide highly-controlled phonics practice and offer a complete basic course in decoding. They can also serve as supplemental reading texts when using other programs such as Phonics Readers as the scope and sequence of each series correlates.Level C features+ Digraphs+ Blends+ Final e+ Inflectional Endings+Long Vowels+Variant Vowels+Diphthongs* Introduces long vowels and intermediate blends.* Help children learn to decode words in connected text.* Introduces longer sentences with sentence connectors, which help children build fluency and reading stamina.