Key Findings at a Glance
- Reading is not natural. Unlike speech, the brain has no dedicated circuit for reading. It must be explicitly taught, and the method matters enormously.
- Skilled reading requires two sets of skills. Scarborough's Reading Rope shows that word-level skills (decoding, phonological awareness) and meaning-level skills (vocabulary, background knowledge, comprehension) must both be built together, from day one.
- The brain can build reading circuits at any age. Neuroplasticity research confirms that effective instruction changes brain activation in both children and adults. The "window" never fully closes.
- Encoding (spelling) strengthens reading. Teaching students to write words, not just read them, builds stronger letter-sound connections and accelerates fluent reading. Decoding and encoding are reciprocal.
- Background knowledge drives comprehension. You cannot understand a text about tectonic plates if you've never encountered the concept. Knowledge-building is not a bonus: it is a core component of reading instruction.
- It works at scale. Mississippi moved from 49th to 9th nationally in reading after implementing structured literacy statewide, a programme that addressed both word recognition and language comprehension. The evidence is not theoretical.
How the brain learns to read
Reading is not a natural human activity. Unlike speech, which the brain is wired for from birth, reading is a cultural invention only a few thousand years old. The brain has no dedicated reading circuit. It must repurpose existing circuits for vision and language. This process, called neuronal recycling, requires explicit instruction. The brain does not figure it out on its own.
Scarborough's Reading Rope
In 2001, researcher Hollis Scarborough proposed a model that has since become one of the most widely used frameworks in reading education. Skilled reading, she argued, is like a rope woven from many strands, and the rope is only as strong as its weakest strand.
The bottom strands are word-recognition skills: phonological awareness, decoding (and its mirror, spelling), and sight recognition of familiar words. These are the skills most schools failed to teach explicitly.
The top strands are language comprehension skills: background knowledge, vocabulary, syntax, verbal reasoning, and understanding how different texts work. These are the skills most catch-up programs skip entirely.
When all the strands are strong and tightly woven, you get skilled reading: fluent, accurate, and with deep comprehension. When even one strand is weak, the whole rope frays. This is why teaching "just phonics" is not enough, and neither is "just read more books." Most catch-up programs only address the bottom strands. We address both, simultaneously, from day one.
Scarborough, H.S. (2001). Connecting early language and literacy to later reading (dis)abilities. In S. Neuman & D. Dickinson (Eds.), Handbook for Research in Early Literacy. Guilford Press.
The Five Building Blocks of Reading
In 2000, fourteen independent researchers, appointed by the US Congress with no political or commercial ties, reviewed the global evidence on reading instruction. Their conclusion: five skill areas are foundational to learning to read, and all are supported by rigorous evidence. First, the ability to hear and manipulate sounds in spoken words. Second, knowing which letters and letter combinations make which sounds. Third, reading accurately, smoothly, and at a reasonable speed. Fourth, knowing what words mean. Fifth, understanding what you read. These five areas form the foundation of what's now called structured literacy. Every program we build addresses all five, directly and systematically.
National Reading Panel. (2000). Teaching Children to Read. National Institute of Health.
Brain Words and Orthographic Learning
Researchers Gentry and Ouellette describe how the brain stores words through a process called orthographic learning. When a reader encounters a word repeatedly through effective instruction, the brain stores its spelling, pronunciation, and meaning as a linked package, a "brain word." The more brain words a reader has, the more automatic their reading becomes. This requires a solid foundation in letter-sound knowledge and phonological awareness, plus explicit instruction in both decoding and spelling developed in parallel.
Gentry, R. & Ouellette, G. (2019). Brain Words: How the Science of Reading Informs Teaching. Stenhouse.
What went wrong: the reading wars
For decades, schools across the English-speaking world used approaches to reading instruction that contradicted the evidence. The most widespread was called "balanced literacy." It emphasised surrounding children with books and using context clues, pictures, and the first letter of a word to guess what it says. This strategy, sometimes called the "three-cueing system," was not supported by rigorous research and actually runs counter to how the brain processes written text.
The result: generation after generation of students who never learned to decode. Some became fluent-seeming readers by memorising common words and guessing the rest. Many did not. The students who struggled were often labelled as "slow," "lazy," or "not readers" when the real problem was the instruction they received.
The research consensus across cognitive science, neuroscience, linguistics, and education is clear: structured literacy including sound awareness, decoding, encoding (spelling), fluency, vocabulary, morphology, comprehension, and background knowledge, taught explicitly, systematically, and together, benefits all learners, and is essential for those who would otherwise be left behind.
Where it’s already working
Not everyone agrees. Some educators still defend balanced literacy. Some researchers question the pace of reform. But the jurisdictions that committed fully — and early — have the data. The argument is no longer theoretical.
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Mississippi, USA
49th → 9th
In 2013, Mississippi ranked 49th in Grade 4 reading nationally. By 2024, after implementing the Literacy-Based Promotion Act — mandatory structured literacy, reading coaches in every school, and a third-grade reading gate — Mississippi ranked 9th. Adjusted for demographics, it ranked first. African-American students in Mississippi now outperform their peers in 47 other states.
US NAEP Nation’s Report Card, 2013–2024; Urban Institute demographic analysis
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England
Top 10 globally
England mandated systematic synthetic phonics in 2012 and introduced a phonics screening check for all six-year-olds. By 2021, England ranked in the top 10 countries for Grade 4 reading in the PIRLS international assessment — up from 11th in 2011. The proportion of pupils meeting the phonics standard rose from 58% in 2012 to 88% in 2023.
PIRLS 2021 International Results; England DfE Phonics Screening Check data
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Ontario, Canada
Right to Read
In 2022, the Ontario Human Rights Commission published its landmark Right to Read inquiry — finding that balanced literacy had systematically failed students with reading difficulties, disproportionately affecting students with disabilities and those from lower-income families. Ontario mandated a full curriculum overhaul to structured literacy beginning in 2023.
Ontario Human Rights Commission, Right to Read Inquiry Report, 2022
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Australia
National shift
Australia’s 2005 National Inquiry concluded systematic phonics is essential. Implementation was slow — and by 2023, one in three students still failed to meet grade-level reading expectations on NAPLAN. States including New South Wales and South Australia have since mandated structured literacy curricula, with early results showing improvement in schools that implemented fully.
NAPLAN 2023–2024; Australian Education Research Organisation
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New Brunswick, Canada
+10 points in first partial cohort
New Brunswick, Canada introduced its Building Blocks of Reading in 2021 with the first year of full implementation in English classrooms beginning in Fall 2023. While the first complete cohort who was taught with structured literacy has not yet been assessed at the Grade 4 level, the first partial cohort who were in Grade 2 for partial implementation in 2022–23 performed 10 points higher than the cohort before.
New Brunswick Department of Education, 2023; first full K–3 cohort not yet at Grade 4 assessment results
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North Carolina, USA
All 18 principles
North Carolina is one of the few US states with all 18 fundamental principles of early literacy in place, per the Fordham Institute’s 2025 analysis. Its READ Act mandated structured literacy, evidence-based curriculum adoption, and universal screening. K–3 students have made measurable gains in foundational literacy every year since implementation.
Fordham Institute, 2025; NC DPI K–3 Literacy Assessment Results, 2024
“Many folks said you can’t do that. But we had the exact opposite experience. We raised the level of expectations, and Mississippians rose up and met them.”
— Tate Reeves, Governor of Mississippi, on the third-grade reading gate
What the evidence says about older learners
Most structured literacy research and programs focus on early elementary students. But the evidence supports intervention at every age. Brain imaging studies show that reading instruction changes brain activation in both children and adults. Research on brain plasticity confirms that the brain can build new reading circuits at any age, though older learners may also need support with the emotional barriers that years of struggle create. A major practice guide from the US Institute of Education Sciences recommends explicit, systematic instruction for struggling readers in Grades 4 through 9. The problem isn't that older students can't learn, it's that almost no one has built the programs.
Sources: Dehaene (2009); Aboud et al. (2021), Reading intervention and neuroplasticity (meta-analysis); Deniz et al. (2019), Semantic representations invariant to listening vs. reading modality; Institute of Education Sciences Practice Guide for Grades 4–9