Orton Gillingham Approach¶

Strategy · All strategies
Evidence · 3 claims (2 for, 1 mixed) · 7 studies (3 review, 2 causal, 1 quant-synthesis, 1 theoretical), q1–q4 · 1 of 7 report an effect size

Description¶

The Orton Gillingham (OG) Approach is an explicit, sequential, and multisensory method for teaching reading and spelling, developed in the 1930s by neurologist Samuel Orton and educator Anna Gillingham. Instruction systematically introduces phoneme–grapheme correspondences, with learners seeing, saying, hearing, and writing each element (e.g., tracing a letter in sand while voicing its sound). Lessons follow a predictable diagnostic-prescriptive cycle: review, new concept introduction, blending, dictation, and connected text reading.

Design Implications¶

OG operationalizes several well-supported principles: systematic explicit instruction of grapheme–phoneme correspondences, cumulative review to build automaticity, and multisensory pairing that gives learners redundant encoding channels Automatic word recognition frees cognitive resources for comprehension. [+M]. Its emphasis on decoding to automaticity is grounded in the finding that labored word recognition consumes working memory needed for comprehension Chunking reduces working memory load. [+M]. The multisensory component itself has weaker independent evidence than the explicit, systematic phonics core; the approach's effectiveness appears driven primarily by its structured literacy content and pacing rather than the sensory pairing per se [~M].

Context¶

Requirements¶

• A defined scope and sequence of phoneme–grapheme correspondences, introduced cumulatively
• Diagnostic assessment to pace instruction to the individual learner
• Trained instructors who can deliver scripted, responsive lessons and correct errors immediately
• Frequent, distributed review of previously taught elements

Constraints¶

• Effectiveness drops sharply when phonics is taught incidentally or in unsystematic "embedded" form rather than in OG's explicit sequence [-S]
• The multisensory (VAKT) component adds instructional time without clear additive benefit over well-designed explicit phonics alone [~W]; tracing and sand-writing can consume working memory on motor execution rather than the phoneme–grapheme mapping Cognitive overload degrades learning. [~M]
• Requires intensive one-to-one or small-group delivery; whole-class fidelity is difficult and outcomes weaken with larger ratios [~M]
• Less appropriate for learners who have already achieved accurate decoding, for whom continued phonics drill shows diminishing returns [~M]

Implementation Variability¶

• Certified OG therapy (1:1, diagnostic-prescriptive) vs. OG-influenced classroom curricula (e.g., Wilson Reading System, Barton Reading & Spelling) that standardize the sequence for group delivery
• Lesson length and intensity vary from daily 45–60 minute blocks to twice-weekly tutoring; effects scale with dosage and fidelity
• Digital adaptations (e.g., Nessy, Sonday System) automate the drill-and-review cycle

Target Learners¶

• Struggling decoders and students with dyslexia, who benefit most from explicit, cumulative phonics instruction [+S]
• Beginning readers in early elementary grades, where systematic phonics effects are strongest [~S]
• Less beneficial for adolescents and adults with intact decoding who need comprehension and vocabulary instruction instead [~M]

Target Learning Goals¶

• Phonemic awareness and alphabetic principle
• Accurate, automatic word recognition and spelling Automatic word recognition frees cognitive resources for comprehension. [+M]
• Fluency as a foundation for reading comprehension

Instructions¶

1. Administer a diagnostic assessment of phoneme–grapheme knowledge to place the learner in the sequence.
2. Review previously taught elements through rapid drill, building automaticity.
3. Introduce one new phoneme–grapheme correspondence explicitly, pairing visual, auditory, and kinesthetic channels (see, say, hear, write).
4. Guide blending and segmenting practice with the new element mixed into known elements (chunking new material with review).
5. Dictate words and sentences for spelling, giving immediate corrective feedback.
6. Read connected decodable text containing only taught elements, then assign review for distributed practice.

Related Strategies¶

• Activate background knowledge — OG lessons open by activating what the learner already knows about sounds and letters before adding new content
• Act it out — shares the kinesthetic-engagement rationale, though OG applies it to grapheme–phoneme mapping rather than comprehension
• Train all staff who deliver the foundational literacy block in IMSE OG+
• Use systematic, direct phonics instruction delivered one-to-one when teaching decoding to students with intellectual disability

Examples¶

• Wilson Reading System — an OG-based curriculum widely used in Tier 3 intervention for students with dyslexia, with a fixed 12-step scope and sequence.
• Barton Reading & Spelling System — a scripted, parent- and tutor-deliverable OG-influenced program for one-to-one use.
• Nessy — game-based digital adaptation of structured literacy principles for independent practice between OG lessons.

Key Sources¶

• Ritchey, K. D., & Goeke, J. L. (2006). Orton-Gillingham and Orton-Gillingham–based reading instruction: A review of the literature. The Journal of Special Education, 40(3), 171–183. doi:10.1177/00224669060400030501
• Ehri, L. C., Nunes, S. R., Stahl, S. A., & Willows, D. M. (2001). Systematic phonics instruction helps students learn to read: Evidence from the National Reading Panel's meta-analysis. Review of Educational Research, 71(3), 393–447. doi:10.3102/00346543071003393
• Galuschka, K., Ise, E., Krick, K., & Schulte-Körne, G. (2014). Effectiveness of treatment approaches for children and adolescents with reading disabilities: A meta-analysis of randomized controlled trials. PLoS ONE, 9(2), e89900. doi:10.1371/journal.pone.0089900
• Rose, J. (2009). Identifying and teaching children and young children with literacy difficulties (The Rose Review). DCSF Publications.
• Stevens, E. A., Walker, M. A., & Vaughn, S. (2017). The effects of reading fluency interventions on the reading fluency and reading comprehension performance of elementary students with learning disabilities: A synthesis of the research from 2001 to 2014. Educational Psychology Review, 29, 475–500. doi:10.1177/0022219416638028