Evidence studies
Tier 2 research
Take a closer look at the research and see how our Tier 2 products help teachers close the gap for readers requiring additional support.
Effective, evidence-based intervention
Multiple studies validate our intervention products—including 95 Phonics Lesson Library™, 95 Phonics Chip Kit™, and 95 Multisyllable Routine Cards™—as meeting ESSA standards.
Meaningful gains
When pairing 95 Phonics Lesson Library with 95 Phonics Chip Kit, students showed higher rates of assessed improvement and outperformed peers using other curricula.
Reduced risk levels
Intervention moved learners out of the lowest performance, highest risk band in multiple studies.
Greater growth over time
Consistent, multi-year engagement with 95 Percent Group intervention products helped strengthen and sustain reading performance across grades.
Effective for diverse learners
Results showed gains across a diversity of populations and learning needs including Hispanic students, English learners, students with disabilities, and at-risk students.
Trusted by industry leaders
Our Tier 2 resources are recognized for helping teachers deliver effective intervention and move students forward.
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2025: Tech & Learning Best of 2025, 95 Phonics Tier 2 Solution
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2024: EdTech Awards “Cool Tool,” One95 Literacy Ecosystem™, finalist
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2023: ACE Award for Excellence in Equity, One95 Literacy Ecosystem
Take a closer look at Tier 2 evidence studies
Note: studies open in the same tab
| Product(s) | Grades | State | Study period | Highlights | Link |
|---|---|---|---|---|---|
|
95 Phonics Lesson Library |
4-5 |
Ohio |
Fall 2023 – Spring 2024 |
A mixed-methods study of 4th and 5th graders in an Ohio school district found that students using 95 Phonics Lesson Library significantly outperformed comparison peers on both the Acadience and Ohio State Test assessments, with strong effect sizes (Cohen’s d = 0.58 for 4th grade, 0.87 for 5th grade), while classroom observations also revealed notably higher student engagement in program classrooms. |
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|
95 Phonics Lesson Library and 95 Phonics Chip Kit |
2 |
California |
2022-2023 |
A California study of 505 second graders found that students with prior first-grade experience using the phonics intervention tools achieved nearly 98 points of Acadience Reading growth versus 65 points for peers new to the program, with an additional 20% of experienced students advancing out of the Well Below grade level category. |
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|
95 Phonics Lesson Library and 95 Phonics Chip Kit |
1 |
California |
2021-2022 |
An ESSA Level 2 study of 462 below-benchmark first graders in California found that students using the phonics intervention tools and 95 Phonics Chip Kit gained 38 points on Acadience Reading versus 24 points for comparison peers, resulting in 14% more students on grade level and 16% fewer students well below grade level at the start of second grade. |
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|
95 Phonological Awareness Lessons™, 95 Phonics Lesson Library, and 95 Phonics Chip Kit |
K-1 |
California |
2021-2022 |
An ESSA Level 2 study of 514 ELL kindergarten and first grade students in California found that those using 95 Phonological Awareness Lessons and 95 Phonics Lesson Library significantly outperformed comparison peers on Acadience Reading, with first-grade ELL students growing from 28% to 37% At/Above Benchmark over the school year. |
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95 Phonics Core Program®, 95 Phonics Lesson Library, and 95 Phonics Chip Kit |
1 |
New Jersey |
2021-2022 |
After one year of 95 Phonics Core Program, 95 Phonics Lesson Library, and 95 Phonics Chip Kit, a New Jersey district surged from 33% to 88% of first graders reading on or above grade level—and nearly doubled the number starting the following year on grade level, from 33% to 68%. |
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|
95 Phonics Core Program, 95 Phonological Awareness Lessons, 95 Phonics Lesson Library, 95 Phonics Chip Kit |
K-2 |
Maryland |
2020-2022 |
In a two-year Maryland study, students using One95 achieved double the effect size of their peers at a randomly assigned comparison school on iReady—and those gains held equally for Black/African American students and economically disadvantaged students, providing strong evidence that the program delivers consistent results across racial, ethnic, and socioeconomic groups. |
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|
95 Phonics Core Program and 95 Phonics Chip Kit |
2-3 |
Maryland |
2020-2022 |
In a two-year Maryland study of 1,500+ students in grades 2–3, those using 95 Phonics Core Program and 95 Phonics Chip Kit more than doubled the number of students reading on or above grade level by year’s end—even among students who started a full grade level behind. |
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95 Phonics Core Program, 95 Multisyllable Routine Cards, 95 Phonics Lesson Library, 95 Phonics Chip Kit, 95 Phonics Skill Series™: Short Vowels, 95 Phonics Booster Bundle®: Summer School and Tune-Up |
2-4 |
California |
2019-2022 |
Despite three years of pandemic disruption, a California school using 95 Percent Group products across Tier 1 and intervention achieved over 95% of students reading at grade level by Spring 2022—while also narrowing the ELA achievement gap for English language learners. |
From siloed to aligned
Fulton County Schools in Georgia is a large, diverse district that moved from siloed programs to align every K-3 classroom around one science-of-reading-based solution—with measurable results in just five months.
93%
of second grade students at Fulton County Schools in Georgia scored proficient in reading after just 5 months of instruction—up from 63% at the beginning of the year.
Featured research
How 95 Phonics Lesson Library transforms reading outcomes
A study by LXD Research found that schools using 95 Phonics Lesson Library saw triple the growth on state reading tests. Educators reported greater confidence, and students made significant gains in fluency, comprehension, and vocabulary.
Our sustained, strategic investment in research both provides us with the information we need to continue to grow and develop our product offerings and demonstrates to educators the power of our programs to accelerate literacy skill development for all students. We are excited to expand our listings on the highly respected Evidence for ESSA to include supporting intervention for students in grades 4-5.
Brad Lindaas
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Meeting the highest standards
Learn more about how our ecosystem delivers effective, evidence-based literacy instruction.
Tier 1 research
Review the research demonstrating the effectiveness of our core instruction products—designed to promote foundational reading skills and reduce the need for intervention.
Tier 3 research
Read the research showing how our solution helps teachers deliver effective, individualized support for students who need intensive intervention.
One95 Literacy Ecosystem™ research
Review research demonstrating how combining the aligned products of One95 Literacy Ecosystem results in consistent, evidence-based instruction that accelerates student outcomes across all tiers.