Decodable texts are carefully sequenced to progressively incorporate words that are consistent with the letters and corresponding phonemes that have been taught to the new reader.
[2] Whole-language texts have received increasing criticism for encouraging word guessing strategies instead of skilled reading.
[citation needed] Both decodable texts and whole language readers typically have levels to provide an indication of their reading difficulty.
In decodable texts, levels introduce new sounds and letters, and progressively multisyllable words and more complex sentences.
[12] Some series are also specifically targeted towards teenage and adult learners, including Saddleback TERL Phonics Book Sets.