Basic language concepts are taught through brightly illustrated readers that emphasize comprehension and language skills. Subjects include the alphabet and letter sounds, consonants and vowels, blended sounds, reading, spelling, rhyming, sequence, nouns, verbs, pronouns and contractions. Constant review of previous concepts helps students achieve mastery learning. The Student book includes activity worksheets that correlate with the lessons in the Teacher's Guide. Book Four covers digraphs, silent letters, non-phonetic words and suffixes.