Orton-Gillingham in 2025: what the latest research and state laws actually say

Last updated 2026-07-09

What is Orton-Gillingham and why is it in the news right now?

Orton-Gillingham is a structured literacy approach built in the 1930s by neurologist Samuel Orton and educator Anna Gillingham. It teaches reading and spelling from the smallest sound units (phonemes) up through syllables, morphemes, and whole words, using auditory, visual, and kinesthetic channels at the same time. Students trace letters while saying sounds, break words apart with physical tiles, and drill blending in short, frequent sessions.

OG is back in the news for one reason. State legislatures are rewriting reading law faster than they have in decades. Between 2021 and early 2025, more than 40 states passed or heavily amended reading legislation requiring 'evidence-based' or 'structured literacy' methods, and OG is the most recognized name in that space ^[1]. When Mississippi's reforms produced big third-grade reading gains starting around 2019, advocates in other states pointed to structured literacy as the cause, and OG-affiliated programs became shorthand for the whole idea.

The coverage is often sloppy. Reporters use 'Orton-Gillingham' to mean any systematic phonics program, when it's really a specific method with its own training hierarchy, certifications, and fidelity rules. That distinction matters the moment you sit down in an IEP meeting.

If you're catching early signs of dyslexia in your child, OG is probably the first thing you'll hear about. No coincidence. It has the longest track record, the most trained practitioners, and the most name recognition among special education attorneys.

What does the research actually say about Orton-Gillingham?

Here's the honest version. OG works, but the research base is messier than its fans admit.

A 2019 systematic review by Stevens, Walker, and Vaughn in the Journal of Learning Disabilities looked at 24 studies of OG and OG-based interventions and reported small-to-moderate effects on reading outcomes, with the authors concluding the results 'did not significantly differ from zero' for several outcomes once weaker studies were accounted for ^[2]. Translation: real promise, shaky proof. The reviewers flagged small samples, missing control groups, wide variation in what counted as 'OG,' and short follow-up windows.

The What Works Clearinghouse (WWC) at the U.S. Department of Education reviews specific OG-based programs one at a time, not OG as a category. Programs like Wilson Reading System have landed at ratings such as 'potentially positive' with moderate or low evidence strength ^[3].

Nobody has clean long-term data at scale. The closest thing is state trend analysis, like Mississippi's NAEP gains, and those bundle dozens of policy changes together, not OG alone ^[10].

For phonological dyslexia, the most common profile, OG's explicit phoneme-grapheme mapping matches the deficit well. For children with double deficit dyslexia, which pairs a phonological weakness with slow rapid naming, OG hits the phonological piece but usually doesn't target naming speed. That's a gap worth knowing before you sign anything.

OG is among the best-supported approaches we have for struggling readers. In this field, though, 'among the best' means moderate evidence, not settled science.

Which states now require Orton-Gillingham or structured literacy in schools?

No state mandates Orton-Gillingham by brand name. States mandate 'structured literacy,' 'evidence-based reading instruction,' or approved program lists, and OG-aligned programs dominate those lists.

State	Key law	What it requires	Effective year
Mississippi	Literacy-Based Promotion Act (updated)	Evidence-based K-3 reading, mandatory intervention	2013, updated 2022
Tennessee	READ Act	Structured literacy training for K-3 teachers, approved program list	2021
North Carolina	Excellent Public Schools Act	K-3 foundational reading skills, OG-based programs on approved list	2021
Ohio	Dyslexia and Reading Achievement Act	Screener plus structured literacy intervention for at-risk students	2022
Texas	HB 3928 / Dyslexia Handbook	Dyslexia identification plus structured literacy, handbook references OG	Ongoing
California	AB 2222	Science-of-reading professional development for K-2 teachers	2023
New York	Reading legislation	Evidence-based literacy instruction statewide	2024

This table isn't exhaustive. The Education Commission of the States tracks state reading legislation and counted 41 states with active science-of-reading policy requirements as of early 2025 ^[1].

Here's what it means for you. If your child's school is in one of these states and isn't using structured literacy methods, you have a policy argument sitting on top of your IDEA rights. That combination carries weight in an IEP meeting.

How does OG training work, and does your child's teacher have it?

Most parents never ask this until it's too late. OG is a practitioner-level approach, and training quality is all over the map.

The Academy of Orton-Gillingham Practitioners and Educators (AOGPE) is the main credentialing body. Their levels run from Associate (about 60 contact hours plus 100 supervised hours of practice) up to Certified Practitioner (200-plus contact hours and 1,000 supervised hours) ^[4]. A teacher who sat through a two-day OG workshop is not an OG practitioner in any clinical sense.

Many schools buy a packaged OG-based program like Wilson Reading System, Barton, or SPIRE, each with its own training track. Those are real structured literacy programs, but calling them 'OG' is loose. Wilson, for one, runs its own certification, separate from AOGPE.

Ask this directly: 'What training does the person delivering my child's reading intervention have, and how many hours?' Put it in an email before the meeting so the answer comes back in writing. If the reply is 'she attended a three-day professional development,' that tells you whether to push for more intensive services or an outside provider.

Teacher supply is a real bottleneck. The International Dyslexia Association has reported that many states with new structured literacy mandates lack enough trained teachers to deliver them right away ^[5]. Some districts train paraprofessionals to run OG programs under teacher supervision, which is legal and can work, though fidelity monitoring matters.

What are your child's legal rights to OG-style reading intervention at school?

Your child's rights come from two federal laws: the Individuals with Disabilities Education Act (IDEA) and Section 504 of the Rehabilitation Act.

Under IDEA, a child with a specific learning disability in reading (which includes dyslexia) is entitled to a Free Appropriate Public Education (FAPE) in the Least Restrictive Environment. The IEP must include services 'based on peer-reviewed research to the extent practicable,' per 20 U.S.C. § 1414(d)(1)(A)(i)(IV) ^[6]. That phrase is your hook for requesting OG or an OG-based program. You're asking for a method that has a peer-reviewed base.

IDEA does not force schools to use any named program. But if the current approach isn't working and you can show OG-aligned methods have evidence behind them, you can make a documented request and require the team to answer it in writing.

Section 504 covers students with a disability that substantially limits a major life activity (reading counts) who may not meet IDEA's stricter eligibility bar ^[7]. A 504 plan can add accommodations like extended time, audiobooks, and reduced copying, but it doesn't force the school to change how it teaches the way an IEP can.

Now the word 'dyslexia.' Federal guidance from the U.S. Department of Education (the 2015 Dear Colleague Letter on dyslexia) states plainly that there is nothing in IDEA that prohibits using the terms dyslexia, dyscalculia, or dysgraphia in IEP documents ^[8]. You can ask for dyslexia to be named in the present levels section, and for OG-based intervention to be named in the services section. The school can push back. It cannot refuse to discuss it.

If you're prepping for an IEP meeting and want a question checklist, the ReadFlare parent advocacy kit walks through this exact sequence.

All of it starts with an evaluation. A school dyslexia test or independent learning disability test builds the profile that drives the IEP.

How is OG different from other structured literacy programs?

Structured literacy is the umbrella. OG is one approach under it. Other members of the family include Wilson Reading System, Barton Reading and Spelling, SPIRE, RAVE-O, and LIPS (Lindamood Phoneme Sequencing). They share the same bones: explicit, systematic, sequential, multisensory, diagnostic. They differ in sequence, pacing, training demands, and materials cost.

Wilson Reading System came straight out of OG and is built around 12 tightly ordered steps. Schools like it because the training pathway is clear and the materials come packaged. Barton is designed for parents with no prior training, which makes it a favorite for homeschooling families.

OG in its 'pure' form is more individualized and less scripted than Wilson or Barton. A certified OG practitioner is supposed to teach diagnostically, adjusting each lesson to the student's response. That flexibility is a strength with a skilled teacher and a liability with an undertrained one.

For children with surface dyslexia, whose main trouble is irregular words rather than phonological decoding, OG's phonics emphasis may need extra orthographic mapping practice bolted on. For children with visual dyslexia profiles, the tracing and kinesthetic elements are thought to help, though the evidence on that specific claim is thin.

So don't fall in love with the brand name. Ask what program the school uses, what training the teacher has, and whether the program carries WWC or IDA evidence ratings. That's a far more useful conversation than demanding the letters 'OG.'

What does OG cost if you hire a private tutor?

Private OG tutoring is expensive. Rates in 2024 and 2025 typically run $80 to $200 per hour depending on the practitioner's certification level, your location, and local demand ^[5]. A certified OG practitioner at the Fellow level in a major metro can charge $150 to $250 an hour.

Most reading intervention research suggests students need at least 100 hours of structured work to show durable gains, and some with heavier profiles need 200 or more ^[2]. At $100 an hour, 150 hours runs $15,000. That's real money, and most insurance won't touch it.

Some states have scholarship or voucher programs that offset costs. Florida's Family Empowerment Scholarship for Students with Unique Abilities, for example, can pay for tutoring by approved providers. Check your state department of education for the local equivalent.

If cost is the wall, look at three cheaper routes. Barton Reading is parent-delivered, with a one-time materials cost of roughly $299 to $700 per level depending on where you buy. Your local university reading clinic is often subsidized. A trained reading specialist at a nonprofit learning center can deliver structured literacy for less. None of these is clinical OG, but each is structured literacy at a lower price.

Document everything. If you later chase reimbursement through an IEP dispute or due process, receipts and progress records from private tutoring strengthen your case that the school failed to provide FAPE.

What are the biggest criticisms of Orton-Gillingham?

OG has real critics, and their arguments are worth knowing before you commit.

Start with the training problem. Because 'OG' is not a trademark, anyone can slap the label on a program. That variability makes it hard to know what you're getting when a school says it 'uses OG.'

Next, pacing. Traditional OG is slow by design. It's deliberately cumulative, so a student might spend weeks on consonant-vowel-consonant words before touching blends. Some researchers argue that faster, multicomponent programs like RAVE-O, which weave in fluency and vocabulary alongside phonics, get children to grade level sooner.

Third, the group-size evidence gap. Most OG research studied one-to-one tutoring. Schools almost never deliver OG one-to-one because of cost. Effect sizes in small groups of three to five tend to drop, and there's almost no solid research on whole-class OG delivery ^[2].

Fourth, fluency and comprehension. Traditional OG doesn't explicitly train either. A child can decode accurately after OG and still read so slowly that meaning falls apart. Good practitioners layer fluency work in, but the core program doesn't require it.

None of this makes OG bad. It makes 'my school uses OG' the start of a conversation, not the end of one. Ask about group size, session frequency, fluency practice, and how progress gets measured.

How do I tell if OG is actually working for my child?

You should see measurable progress within 8 to 16 weeks of consistent, well-delivered intervention. 'Measurable' means scores on a standardized reading measure, not a teacher's impression.

Ask for curriculum-based measurement (CBM) data, specifically oral reading fluency (ORF) probes, weekly or every two weeks. DIBELS 8th edition and AIMSweb are the tools most schools use. A student in intensive intervention (usually 45 to 90 minutes a day, 5 days a week) should show a growth rate roughly double the typical peer rate to close the gap over time ^[3].

If your child sits in a 30-minute, two-days-a-week pull-out group and you're told that's 'the OG intervention,' that's almost certainly not enough dosage for significant dyslexia. Research keeps showing that struggling readers need more time, not less, for intervention to land ^[2].

Under IDEA, the IEP must include measurable annual goals plus a description of how progress gets measured and how often you'll hear about it ^[6]. If the IEP doesn't name the measurement tool and the frequency, ask for both to be added before you sign.

Watch the signals at home too. A child making real gains usually gets a little more willing to try reading, even if it's still slow going. Persistent avoidance after several months of intervention is worth flagging.

What's new with OG in 2025, specifically?

A few things are worth tracking this year.

Certification expansion. AOGPE has been scaling up its pipeline of certified practitioners to meet state mandates. It updated training requirements in 2023 and has been approving more training programs to keep pace with demand ^[4].

New York's reading overhaul. New York City schools started a major curriculum shift in 2023 and 2024, swapping balanced literacy for structured literacy programs, including OG-aligned approaches. Rollout has been uneven, and parent reports vary a lot. Research groups are watching the data.

Federal and union attention. The American Federation of Teachers and the National Education Association have both put out guidance touching on structured literacy in the past two years, a real shift from the reading wars of the 2000s.

AI-assisted OG tools. Several ed-tech companies have launched apps claiming to deliver OG-based phonics practice. Research on whether an app can replicate the diagnostic teaching that defines real OG is essentially nonexistent as of mid-2025. Use them as supplements, never replacements.

For kids showing early reading trouble, the free screeners in the ReadFlare reading toolkit can help you document concerns before a formal school evaluation.

If your child shows a rapid naming deficit alongside phonological struggles, watch whether any new 'OG' programs start addressing that component head-on. It's the piece the field has left underdeveloped for years.

How do I ask my child's school for OG-based instruction?

Start in writing. Email the special education coordinator or your child's teacher and do three things: describe what you're seeing at home, name OG or structured literacy as your request, and ask for a written response. Schools don't have to say yes. They do have to respond.

If your child already has an IEP, request a meeting. You can request one at any time under IDEA ^[6]. Bring documentation: any private evaluation you've had, standardized scores from school assessments, and a written summary of your child's reading history. The more specific and data-driven your request, the harder it is to wave off.

If the school declines to change the intervention, you have escalating options. A facilitated IEP meeting brings in a neutral third party. Mediation is free through most state education agencies. Due process is a formal legal hearing. Most families settle disagreements before due process through persistence and documentation, not lawyers.

Getting a private evaluation first often shifts the dynamic. A neuropsychologist or educational psychologist's report that identifies dyslexia and recommends structured literacy makes it far easier to argue for OG-based services. That evaluation runs $1,500 to $3,500 out of pocket. You can also ask the school to fund an Independent Educational Evaluation (IEE) if you disagree with the school's own evaluation.

Knowing the learning disabilities framework helps you figure out which category your child's reading profile fits before you walk into that meeting.

Frequently asked questions

Is Orton-Gillingham the same as structured literacy?

No. Structured literacy is the broad category, defined by the International Dyslexia Association as explicit, systematic, sequential, diagnostic, and multisensory instruction. OG is one approach within it. Wilson, Barton, SPIRE, and RAVE-O are others. When a state law requires 'structured literacy,' it doesn't mean OG specifically, but OG-aligned programs almost always qualify under those laws.

Can parents deliver OG at home without a certification?

Yes, with caveats. Programs like Barton Reading and Spelling are designed for parent delivery and include training materials. They're OG-based but scripted, which lowers the need for diagnostic expertise. Pure OG, as certified practitioners deliver it, takes substantial training. If you go the parent-delivery route, pick a program built for it rather than trying to run clinical OG out of a workbook.

How many sessions per week does OG require to work?

Most research on OG and related structured literacy programs showing meaningful gains used intervention four to five days per week, in sessions of 45 to 90 minutes. Two or three days a week is common in schools but produces slower progress. If your child's IEP offers two sessions per week, ask the team to document why that dosage is enough given the size of your child's reading gap.

Does OG work for kids who don't have dyslexia?

OG is built for students with dyslexia or significant reading difficulties, but its methods (explicit phonics, systematic sequence, multisensory practice) help most early readers. The National Reading Panel's 2000 report found systematic phonics instruction helps all early readers, not only those with identified disabilities. OG is essentially a more intensive version of good foundational reading instruction.

Is OG covered by insurance or Medicaid?

Rarely. Private health insurance does not typically cover reading tutoring. Some state Medicaid waivers cover educational therapies for children with disabilities, but coverage varies a lot by state and diagnostic code. A few states with education savings account or scholarship programs let OG tutoring count as a qualifying expense. Check your state department of education website for current options.

What's the difference between OG and Wilson Reading System?

Wilson Reading System was developed directly from OG principles and follows the same multisensory, phoneme-grapheme sequence. The main differences: Wilson is more scripted and packaged, which makes fidelity easier to monitor, and Wilson has its own certification separate from AOGPE. For school delivery, Wilson is often more practical because teachers can be trained to run it consistently. The IDA considers both OG-based.

At what age should a child start OG intervention?

Earlier is better. Research consistently shows reading intervention works best in kindergarten through second grade, when the brain is most plastic for phonological learning and before reading failure sets in. If a child shows reading difficulty by the end of kindergarten, that's the time to push for screening and intervention, not wait-and-see. OG has worked with adults too, so older students should never be counted out.

Can my child get OG in a regular classroom, or does it have to be a pull-out setting?

OG can be delivered in small groups inside the classroom, in a pull-out setting, or one-to-one. Most research showing strong effects used one-to-one or very small groups of two to three students. Whole-class OG exists in some schools but has less research support. If your child has an IEP, the setting and group size should be written into the services section.

Does my school have to use OG if I request it in an IEP meeting?

No. IDEA requires IEP services to be based on peer-reviewed research but does not require any specific named program. The school can offer a different evidence-based structured literacy program. What it cannot do is ignore your request without explanation. If you disagree with the alternative, document your objection in writing, ask for their reasoning in writing, and consider requesting an independent evaluation.

How do I find a certified OG tutor near me?

The AOGPE keeps a practitioner directory on its website (aogpe.org). The International Dyslexia Association (dyslexiaida.org) has a branch locator and referral resources. Ask about the practitioner's certification level, how many supervised hours they've completed, and how they measure and report progress. A legitimate practitioner will have clear answers to all three questions.

Is there an OG approach for math or number difficulties?

OG itself is a reading and spelling intervention. For math difficulties, sometimes called dyscalculia, different structured approaches apply, such as Math Recovery or Numeracy Recovery. Some OG practitioners fold multisensory math methods into their reading work, but that isn't standard OG. If your child struggles with both reading and numbers, those are usually treated as separate intervention targets.

What test results would show my child needs OG?

Look for low scores on phonological awareness subtests (like the CTOPP-2), word reading and decoding (TOWRE-2, WIAT-4 Word Reading), and spelling. A profile with phonological weaknesses alongside average or higher reasoning ability is the classic indicator for OG intervention. Rapid naming scores (RAN/RAS) help identify a double-deficit profile that may need supplemental fluency work beyond OG.

Sources

1. Education Commission of the States, reading policy tracking: As of early 2025, more than 40 states have passed science-of-reading or structured literacy policy requirements.
2. Stevens, Walker & Vaughn (2019), Journal of Learning Disabilities, systematic review of Orton-Gillingham interventions: A 2019 systematic review of 24 OG intervention studies found small-to-moderate effects on reading outcomes, with several results not significantly differing from zero once weaker studies were accounted for, and noted methodological limitations including small samples and variable OG definitions.
3. What Works Clearinghouse, U.S. Department of Education: WWC rates specific OG-based programs such as Wilson Reading System individually, generally as 'potentially positive' with moderate or low evidence strength.
4. Academy of Orton-Gillingham Practitioners and Educators (AOGPE), certification requirements: AOGPE Associate-level certification requires roughly 60 contact hours of training plus 100 supervised practice hours; Certified Practitioner requires 200-plus contact hours and 1,000 supervised hours.
5. International Dyslexia Association, state legislation and policy resources: The IDA reports that many states with new structured literacy mandates lack sufficient trained teachers for immediate implementation; private OG tutoring rates range from roughly $80 to $200-plus per hour.
6. Individuals with Disabilities Education Act, 20 U.S.C. § 1414: IDEA requires IEP services 'based on peer-reviewed research to the extent practicable' per 20 U.S.C. § 1414(d)(1)(A)(i)(IV), and parents may request an IEP meeting at any time.
7. U.S. Department of Education, Dear Colleague Letter on Dyslexia (October 2015): ED guidance states there is nothing in IDEA that prohibits the use of the terms dyslexia, dyscalculia, and dysgraphia in IEP documents, and encourages using them when appropriate.
8. National Reading Panel, NIH Publication No. 00-4769 (2000): The National Reading Panel found systematic phonics instruction benefits all early readers, supporting structured literacy principles beyond students with dyslexia.
9. Mississippi Department of Education, Literacy-Based Promotion Act: Mississippi's structured literacy reforms beginning in 2013 and updated in 2022 are associated with notable NAEP third-grade reading score gains, though many policy changes occurred at the same time.
10. Comprehensive Test of Phonological Processing (CTOPP-2), PRO-ED Inc.: CTOPP-2 phonological awareness and rapid naming subtests are widely used to identify profiles consistent with dyslexia and candidacy for OG intervention.