The OG approach and the WRS are two of the most widely recognized multisensory reading programs developed to help individuals with reading difficulties, especially dyslexia. Both are based on similar principles of explicit, systematic phonics instruction, while each has a very different structure, methodology, and scope. Understanding these differences will assist parents, educators, and specialists in selecting the proper approach for a learner's unique needs.
Foundations and Philosophy
The Orton-Gillingham approach, developed at the beginning of the 20th century by neurologist Dr. Samuel Orton and educator Anna Gillingham, is not a program but a philosophy or methodology that stresses multisensory, sequential, and cumulative instruction of reading, writing, and spelling. OG is diagnostic and prescriptive, which means that instruction is constantly adjusted based on the student's progress and needs.
In contrast, the Wilson Reading System was developed in the 1980s by Barbara Wilson. It is another specific, structured literacy program: it is based on Orton-Gillingham principles, but it is a more defined curriculum and materials package. The Wilson Reading System offers step-by-step lesson plans with detailed scripts and explicit strategies to guide instructors through each stage of literacy instruction.
Teaching Methodology Both OG and Wilson rely on explicit, systematic, and multisensory teaching. All three pathways—visual, auditory, and kinesthetic-tactile—are engaged at the same time with the intent to solidify learning. However, OG is designed to be flexible: it allows the tutor to adjust the lesson to fit an individual student's pace and learning style. Teachers can create customized materials or adjust lesson sequences according to the progress of students. By contrast, the Wilson Reading System is very structured and prescriptive, comprising 12 steps organized sequentially from phonological awareness to higher reading and spelling skills. The learner must master one step before proceeding to the next; this ensures that foundational skills are sound before more complicated ones are introduced. This makes WRS highly suitable for educators who seek a clear, research-supported framework rather than having to devise their own lessons. Target Audience and Training The Orton-Gillingham approach is very flexible and can be applied to many types of learners, from early-childhood learners with difficulties in beginning literacy to adults struggling with dyslexia. Highly adaptable, OG can also be used in one-on-one tutoring, small groups, and classroom settings. However, it requires extensive teacher training to apply effectively, as instructors must learn how to diagnose reading difficulties and adjust lessons in real time. The Wilson Reading System, also designed for students with dyslexia, is often recommended for grade 2 and above, as well as for those students who can already understand simple phonetic concepts but lack fluency and comprehension. It requires Wilson teachers to obtain a certification to ensure fidelity to the program's structured framework; this training provides educators with a ready-made curriculum, and it is thus somewhat easier to execute consistently across varied settings. Assessment and Progress Monitoring Both systems provide for continued assessment: OG teachers use daily observation, dictation, and performance tasks to understand who is comprehending, and where the lesson needs adjustment. Wilson has built-in mastery checks and progress monitoring tools at the end of each step, before considering proficiency achieved and moving on. Its regularity is particularly suitable for schools requiring a standardized reporting of progress. Conclusion In a nutshell, Orton-Gillingham is flexible and can be tailored on an individual basis, and the Wilson Reading System is a structured program based on OG principles. OG is ideal for teachers or literacy specialists who would like to tailor their instruction to specific needs, whereas Wilson provides a more systematic and organized approach that is well-suited for school-based interventions. Both are aimed at the same goal of empowering poor readers through explicit, multisensory, evidence-based literacy teaching, but the best choice depends on the learner profile, teacher expertise, and educational context.
