What is Structured literacy?

According to the International Dyslexia Association:

 "Structured Literacy is characterized by the provision of systematic, explicit instruction that integrates listening, speaking, reading, and writing. Structured Literacy teaches the structure of language across the speech sound system (phonology), the writing system (orthography), the structure of sentences (syntax), the meaningful parts of words (morphology), the relationships among words (semantics), and the organization of spoken and written discourse."