EBLI vs. Orton-Gillingham: A Parent's Plain-Language Guide
EBLI vs. Orton-Gillingham: A Parent's Plain-Language Guide
A parent comes home from a dyslexia evaluation with a recommendation for OG tutoring. She finds a local tutor. She joins a homeschool Facebook group for support. Within two days, someone posts: "Have you looked at EBLI? We switched from OG and my son went from barely reading to grade level in six months." Someone else responds that OG has decades behind it and EBLI hasn't been proven. A third person says they're the same thing with different branding.
The parent closes her phone.
Here's what's going on in that conversation.
What EBLI is
EBLI stands for Evidence-Based Literacy Instruction. It was developed by Nora Chahbazi, a Michigan-based literacy specialist, drawing on the work of linguist Dr. Diane McGuinness.
Like OG, EBLI is a structured literacy approach: explicit, systematic, and multisensory. It teaches phonics, how sounds and letters connect, and it's specifically designed for kids who don't pick up reading and spelling through casual exposure. That puts it in the same broad family as OG, Barton, Wilson, and All About Spelling.
What makes EBLI distinct is the direction it starts from.
The difference that matters: which way do you go?
OG and most OG-based programs are print-to-speech. The teacher shows a letter or letter pattern, and the child learns what sound it makes. See "igh," learn it says /eye/. See "tion," learn it says /shun/. The instruction moves from the written form to the spoken sound.
EBLI is speech-to-print. The teacher starts with a spoken sound and teaches all the ways it can be spelled. The /sh/ sound, for example, can be spelled "sh," "ti," "ci," "ss," "ch," and several others. EBLI introduces that variability up front, rather than treating alternate spellings as exceptions to memorize later.
Neither direction is obviously wrong. Reading researchers disagree — respectfully and at length — about which sequence produces better outcomes. What matters for parents is knowing these are not the same instructional logic in different packaging. They are organized differently at a foundational level.
EBLI also removes several structural elements OG programs typically include:
- No syllable-type rules. OG programs usually teach six or seven syllable types (closed, open, VCe, vowel team, etc.) and syllable-division strategies as scaffolding. EBLI argues these add cognitive load without improving results and drops them.
- No sight-word memorization as a separate strand. OG programs typically teach irregular high-frequency words as visual wholes — you see "said" enough times, you just know it. EBLI teaches even irregular words using the same phoneme-grapheme logic it uses for everything else.
The practical result: EBLI instruction tends to move faster and cover a smaller explicit rule set. OG instruction tends to be more scaffolded and broader in scope.
What OG does that EBLI doesn't
A few things OG programs typically include that EBLI either omits or de-emphasizes:
Morphology. Newer OG-aligned programs, particularly those following the International Dyslexia Association's Structured Literacy framework, include explicit instruction in prefixes, suffixes, and word roots. That morphological layer helps kids decode and spell unfamiliar words they've never encountered before. EBLI's emphasis is primarily on phoneme-grapheme mapping, with less systematic coverage of morphology.
A fixed scope and sequence tied to a named curriculum. OG has codified training programs, IDA-accredited certifications, and a large network of tutors whose credentials are legible to school evaluation teams and IEP writers. When a specialist writes "OG tutoring" in an IEP, both the school and the tutor know what that means. EBLI is better understood as a methodology practitioners layer onto whatever materials they're already using. That flexibility suits some tutors well. For parents navigating a formal evaluation, the labeling matters.
What the research actually shows
Both approaches have more practitioner support than peer-reviewed proof, and that's worth saying plainly.
A 2021 meta-analysis published in Exceptional Children reviewed 24 studies on OG-based interventions. The finding: a positive effect on word-level reading, but not statistically significant (effect size 0.22, p = 0.40). The authors concluded that OG has a reasonable evidence base but called for more rigorous research. The Hechinger Report covered this accessibly for anyone who wants the full summary.
EBLI has one published randomized controlled trial, a 2017 University of Michigan study covering 63 teachers and more than 1,000 students in Michigan charter schools. It found no significant impact on student reading performance. EBLI's own outcome data, available on its website, shows pre-post gains but lacks the control groups that would let you separate the instruction from everything else happening in a child's life.
There are also no rigorous head-to-head studies comparing EBLI and OG directly. The practitioners who love EBLI often came to it because OG moved too slowly for their students. The practitioners who prefer OG often value the structured scope and sequence. Both can point to kids who made real progress. Neither can point to a study proving superiority over the other.
This doesn't mean the approaches don't work. Both beat doing nothing. But the research is more humble than the marketing, and parents navigating this space deserve to know that going in.
What this means practically
For most families, the right question isn't "EBLI or OG?" It's whether the practitioner in front of them is skilled, responsive to their specific child, and working from a principled approach, whichever one it is.
A few things worth asking any tutor or evaluator:
- What does your scope and sequence look like, and how will you know when to move forward?
- How do you handle high-frequency words like "said" and "because" — as patterns, or as visual memory?
- Do you include morphology (prefixes, suffixes, roots), and if so, when?
- What does a typical session look like?
Those questions will tell you more than which label is on the method. Both EBLI and OG share the same foundational structured literacy principles: explicit instruction, systematic sequencing, multisensory practice. Those shared principles are what the International Dyslexia Association treats as load-bearing — and they're where to focus your vetting.
For context on how these instructional approaches fit into the broader picture of spelling development, The Four Layers of Spelling explains where phonics instruction ends and the practice work begins. For a closer look at how the OG framework translates into specific programs for home use, the OG vs. Barton guide covers that comparison in the same plain-language register.
Where practice fits alongside either approach
One thing EBLI and OG have in common: neither includes a systematic retention layer for spelling in real writing.
Both programs teach the phoneme-grapheme connections. What neither handles on its own is the spaced retrieval practice that turns a taught word into an automatic word — the kind of spelling that shows up correctly in a journal entry six weeks later, not just on Friday's test. That gap exists regardless of which approach a tutor uses, because retrieval practice is a separate cognitive mechanism from instruction. The rules are the blueprint. Repeated retrieval under effort is what builds the permanent memory.
Spellexi is the practice layer for that gap. You read words aloud. Your child writes them on paper. A photo grades the work and schedules each word to come back at the right interval until it's locked in. It works alongside OG-based instruction, EBLI-based instruction, or any other structured literacy approach your family is already using.
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