Systematic phonics

Systematic phonics is an umbrella term used to describe phonics approaches that are taught explicitly and in a structured, systematic manner. They are called systematic because they involve teaching and practicing a planned, sequential set of phonic elements. Specifically, the letter-sound relations are taught in a "prespecified" sequence, as opposed to incidentally or on a "when needed" basis.

A Course of Study in Phonics (224 lessons), San Francisco, U.S., 1912

In addition to being explicit and structured, systematic phonics is often accompanied by instruction that is cumulative, multisensory, and supported by diagnostics.