The Orton-Gillingham approach to reading instruction was developed in the early-20th century. It's language-based, multisensory, structured, sequential, cumulative, cognitive, and flexible. Orton-Gillingham techniques have been in use since the 1930s. These techniques are taught in only a very small number of public school systems today, and then only within special education classes; they're used much more often in private one-on-one tutorials. An intensive, sequential phonics-based system teac… (More on Orton-gillingham)