Understanding letter sounds is an essential piece to the reading proficiency puzzle. Spectrum Phonics for grade 1 guides children through consonant pairs, vowel pairs, end sounds, and vowel sounds. Filled with engaging exercises in a progressive format, this series provides an effective way to reinforce early language arts skills. --Mastering language arts is a long processÑstart with the basics. Spectrum Phonics is here to help children begin a successful journey to reading proficiency. With the help of this best-selling series, your child will improve early language arts skills through practice and activities that focus on phonics, structural analysis, and dictionary skills.