Orton-Gillingham Explained: How It Works, What the Research Says, and Programs That Use It

What is Orton-Gillingham?

Orton-Gillingham is an approach to teaching reading, spelling and writing that breaks written English into small, logical pieces and teaches each one directly. It's best known as a method for children with dyslexia.

The 2021 research review by Stevens and colleagues describes it as "a direct, explicit, multisensory, structured, sequential, diagnostic, and prescriptive approach to reading." Reading Rockets calls it the first teaching approach designed specifically for struggling readers.

Two things to know up front:

1. OG is an approach, not a product. Many programs are "OG-based" or "OG-influenced," and they differ a lot in materials, pace and cost.
2. OG is a type of structured literacy. Structured literacy is the broader umbrella term the International Dyslexia Association uses today.

Where Orton-Gillingham came from

• Samuel Torrey Orton (1879–1948), a neuropsychiatrist and pathologist at Columbia University, studied children who struggled to read despite normal intelligence.
• Anna Gillingham (1878–1963), an educator and psychologist, began working with Orton around 1929.
• Bessie Stillman co-wrote the teaching manual with Gillingham in 1935, Remedial Training for Children with Specific Disability in Reading, Spelling and Penmanship. That manual became the basis of the OG method.

Their key idea was to teach the sounds and spellings of English explicitly, combining what children see, hear, say and feel.

The core principles of Orton-Gillingham

What an Orton-Gillingham lesson looks like

Lessons vary by program and tutor, but a typical one-on-one session includes most of these parts:

The multisensory parts look like: tapping each sound on fingers, "sky writing" a letter with a straight arm, tracing on sand or a textured mat, and moving colored tiles for vowels and consonants.

What the research says

This is where you'll find the most confusion online, so here's what reviews actually found.

• The ingredients are well supported. The National Reading Panel (2000) found strong benefits from explicit phonemic awareness and systematic phonics, which are the core of OG.
• Studies of OG packages are limited. In 2006, the Florida Center for Reading Research found no empirical studies of OG as described in its training materials. In 2010 the What Works Clearinghouse found no OG studies that met its evidence standards.
• The best recent synthesis is mixed. A 2021 meta-analysis by Stevens and colleagues in Exceptional Children looked at OG interventions for students with or at risk for word-level reading disabilities. Effects on foundational skills (phonological awareness, phonics, fluency, spelling) averaged 0.22 and favored OG, but weren't statistically significant. Effects on vocabulary and comprehension averaged 0.14, also not significant. The authors called for more rigorous, larger studies.

What this means for parents: OG isn't proven to beat other well-designed structured literacy programs, and it isn't a cure. But its principles line up with what research supports. The quality of the program and the consistency of the teaching matter more than the OG label.

Programs that use Orton-Gillingham principles

We checked how each publisher describes its own program as of October 2026.

How to choose

• Severe dyslexia, older child: Wilson with a certified instructor, or Barton if you'll tutor yourself and can commit to frequent sessions.
• Young child, mild difficulty or prevention: All About Reading or Logic of English Foundations, taught daily by a parent.
• Spelling is the main struggle: All About Spelling, often alongside a reading program.
• Need independent practice: Explode the Code workbooks or Reading Horizons software, as a supplement, not a replacement for direct teaching.

Orton-Gillingham at home: tips for parents

1. Get a clear picture first. If you suspect dyslexia, ask your school for an evaluation in writing, or see a private evaluator. Results guide how intensive the help should be.
2. Be consistent. Short, frequent sessions (four or five a week) work better than one long weekly session.
3. Follow the program's sequence. Don't skip levels because your child is older; OG programs place by skill, not grade.
4. Keep dictation in every lesson. Spelling is where gaps show up first.
5. Read aloud to your child daily from books above their reading level, so vocabulary and knowledge keep growing while decoding catches up.
6. Watch for frustration. If lessons regularly end in tears, shorten them, review more, or talk with a tutor about pacing.

For extra practice, use the phonics worksheet generator, the spelling worksheet generator and our spelling word lists.

Choosing an Orton-Gillingham tutor

Ask any tutor:

• Which organization trained you, and did training include a supervised practicum?
• How often will we meet, and for how long?
• How do you measure progress, and how often will you share it?
• Which program or materials do you use?
• What will you ask us to practice at home?

Tutoring costs vary widely by region and credentials, so ask for rates up front. Some state scholarship and ESA programs list tutoring and therapies among allowed expenses; each program decides what it covers.

Programs that help

• Barton Reading: scripted, OG-influenced lessons parents can teach one-on-one, with training videos.
• Wilson Reading System: intensive OG-based intervention with a certified instructor.
• All About Reading: gentle, multisensory parent-taught phonics for younger children.
• All About Spelling: OG-approach spelling with letter tiles and dictation.
• Logic of English: explicit, rules-based reading and spelling, including a line for older striving readers.

Compare options in best reading programs for dyslexia, or browse reading tutoring and reading programs for dyslexia. Save picks to your wishlist, then check your state's scholarships to see whether curriculum or tutoring may be covered.