A California school just became one of approximately 20 programs in America to earn Orton-Gillingham Academy accreditation. Here is what that standard actually requires — and how to use it to evaluate any reading program.

Common questions

What is Orton-Gillingham, and is it evidence-based?

Orton-Gillingham is a structured literacy approach developed in the 1930s that teaches reading, writing, and spelling through explicit, systematic, multi-sensory instruction. It is built around the science of how the brain processes letter-sound relationships. The International Dyslexia Association identifies structured literacy, of which OG is the foundational approach, as the evidence-based method for students with dyslexia. The key qualification is implementation fidelity: the approach works when practiced by a well-trained practitioner who assesses and adjusts to the individual child. A program that delivers the same sequence to every child regardless of diagnostic profile is using the label loosely.

How do I evaluate whether a reading program is actually OG?

Start by asking the practitioner which organization certified them and at what level. OGA Fellow is the highest credential the Academy of Orton-Gillingham Practitioners and Educators awards. The International Dyslexia Association also certifies practitioners, with the Certified Academic Language Therapist (CALT) credential indicating rigorous supervised training. Ask how many supervised practice hours they have completed, whether they conduct an individualized diagnostic assessment before instruction begins, and how they adapt instruction to your child’s specific profile. A practitioner who gives every child the same program regardless of assessment is not implementing OG with fidelity.

My child’s school says it uses Orton-Gillingham. Is that enough?

It depends entirely on the depth of training and the fidelity of implementation. Many schools use OG-informed curricula, such as Wilson Reading, Barton, or RAVE-O, that are evidence-based without requiring full OGA program accreditation. The question is not whether the school uses the OG name; it is whether the instruction is systematic, explicit, multi-sensory, and individualized to each child’s assessed needs. Ask the reading specialist what their certification level is, how many supervised practice hours they completed, and how the program adapts to individual diagnostic findings.

How do I know if my child needs structured literacy intervention?

Signs that structured literacy help is worth exploring include: difficulty sounding out new words despite instruction, slow or effortful reading, poor spelling that does not improve with practice, strong avoidance of reading tasks, or a noticeable gap between your child’s overall ability and reading performance. A parent screener is a practical starting point — it helps identify where your child’s reading and language-processing profile points without requiring a clinical label first. A screener is not a diagnosis. If your child might need formal accommodations such as an IEP or 504 plan, or you suspect a vision, hearing, or medical cause, pursue a professional evaluation — that is the route to those supports.