Is Sound Start Literacy
backed by evidence?
Evidence of Effectiveness | ESSA Tier 3
Independent Research Shows Promising Evidence for Sound Start Literacy
An independent study conducted by LXD Research examined first-grade literacy outcomes following two years of school-wide Sound Start Literacy implementation. Researchers compared students receiving Sound Start with a pre-implementation cohort from the same classrooms who were using another popular structured literacy program and adjusted the analysis for students' beginning-of-year reading performance.
The study found statistically significant improvements in key early literacy outcomes:
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+13.8 words correct per minute in first-grade oral reading fluency after adjusting for beginning-of-year performance (p = .019; Hedges' g = .32), equivalent in the report to approximately 1.1 additional months of reading growth.
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Phonemic Segmentation Fluency showed the largest adjusted effect (g = .80; q = .010), estimated at approximately 2.6 months of additional instruction.
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The percentage of first graders scoring above benchmark increased from 39% before implementation to 76% in Year 2, while the overall distribution of students across DIBELS benchmark levels differed significantly between cohorts.
Read the independent research study →
Research-Based Design | ESSA Tier 4
Sound Start Literacy Meets ESSA Level 4: Demonstrates a Rationale
Sound Start Literacy has been independently reviewed by LXD Research and recognized as meeting the criteria for ESSA Level 4: Demonstrates a Rationale. Under ESSA, Level 4 evidence requires a well-defined logic model connecting a program’s design and instructional practices to intended outcomes, supported by relevant research.
The independent review examined the research foundation underlying Sound Start Literacy and how that evidence is reflected in the program’s instructional design. The resulting research summary documents the evidence supporting key components of the program, including:
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systematic, cumulative code instruction
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integrated phonemic awareness and phonics
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explicit morphology instruction
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retrieval-based practice and spelling/encoding
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high-frequency word instruction
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frequent formative assessment and progress monitoring
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professional learning designed to transfer directly to classroom practice
Sound Start Literacy integrates these elements within a systematic K–3 speech-to-print, linguistic phonics sequence that develops phonemic awareness, phonics, fluency, vocabulary, comprehension, and sentence-level writing.
The complete ESSA Level 4 Research Foundation & Logic Model was developed and independently reviewed by LXD Research.
View the ESSA Level 4 Research & Evidence Packet →
General Education Classroom Pilot Over Two Years
2024-2025 Sound Start Literacy Pilot Year
Kindergarten DIBELS
Results after Sound Start Implementation...
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Significantly below Benchmark went from 36% to 5%
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Below benchmark data went from 49% to 15%
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The percentage of students at or above benchmark went from 31% to 84%
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Above benchmark went from16% to 69%
This chart shows the students who received Sound Start in Kindergarten and First Grade.
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Significantly below Benchmark data went from 12% to 5%
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90% of students scored at or above benchmark.
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76% of students scored above benchmark.
