Decodables follow a phonics scope & sequence where each decodable text has a specific focus that need to have been previously taught in order for the reader to decode the text. Sequential decodables get more challenging as students amass more skills. Each chapter in the decodables series helps the reader practice a phonics concept. All research-based reading intervention programs include explicit, direct instruction of the rules of the English language, broken up into easily digestible chunks of information. These decodables are supplemental chunks of text in the form of stories that align with the SOR concepts taught.