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The Intelligent Reading Specialist
Issued by Leanlab Education
An independent evaluation reached a clear conclusion: the more students used LUCA, the more their reading grew, consistently across every measure of use, and the gains were largest for the students who started furthest behind. That is the ESSA Tier III (Promising Evidence) bar, verified by a third party, not a marketing claim.
Trusted by schools and backed by leading research institutions
The ESSA Tier III Promising Evidence Badge from Leanlab Education certifies that a well-designed, well-implemented study, with statistical controls for selection bias, found a meaningful relationship between using LUCA and reading growth. It is a step above the foundational Tier IV, and it is the level ESSA was written to reward as real evidence accumulates.
For a district leader, that translates into something concrete. An independent evaluator studied LUCA across five schools in two states and found that students who used LUCA more made bigger reading gains, after accounting for where they started, their grade, and demographic factors. The relationship held across every measure of use, and it was strongest for the students schools work hardest to reach.
Built with teachers. Verified by Leanlab. Funded by NSF.
This certification sits alongside our NSF SBIR funding (a 3 percent acceptance program), our Carnegie Mellon partnership, and U.S. Patent No. 12,394,332 B2. Independent stamps, all pointing to the same conclusion: this works because of how it works.
The Every Student Succeeds Act defines four evidence tiers that determine whether a tool can be funded with federal dollars. Tier III (Promising Evidence) requires a well-designed correlational study with statistical controls for selection bias, a higher bar than the entry-level Tier IV rationale.
Supported by one or more well-designed and well-implemented experimental studies.
Supported by one or more well-designed and well-implemented quasi-experimental studies.
Supported by one or more well-designed and well-implemented correlational studies with statistical controls for selection bias.
Practices with a well-defined logic model based on rigorous research, with an effort to study their effects planned or underway.
LUCA also holds the foundational ESSA Tier IV Building Evidence Badge. See the Tier IV certification. Tier definitions paraphrased from the Every Student Succeeds Act, Section 8101(21); district leaders should confirm specific allowability with their state education agency.
The Certifying Finding
Students who used LUCA more, by completing more minutes, more modules, and more assignments, showed stronger spring reading scores, even after accounting for where they started, their grade, and demographic factors.
The relationship was consistent and statistically significant across every measure of use we tested. This dose-response pattern is the finding that earned the Tier III certification.
Where It Mattered Most
On oral reading fluency, LUCA's effect was largest for students who started the year furthest behind. In the Pennsylvania sample, struggling readers who used LUCA finished the roughly 15-week pilot about 12.6 words correct per minute ahead of comparable classmates who did not use LUCA.
An early, exploratory signal among students flagged for dyslexia risk pointed the same direction, a finding we are studying further.
LUCA teaches at the level of individual phonics patterns, and measures at that level too. After a single targeted lesson, the typical LUCA student reads a newly taught pattern at essentially the same speed as patterns they already know, the definition of a skill becoming automatic. Passage-level standardized assessments are not designed to capture this. LUCA can show, for every student and every skill, whether the instruction actually worked.
The full ESSA Tier III study report from Leanlab Education is available on request, contact [email protected].
Results from the certified pilot across five schools in Arizona and Pennsylvania. More on our approach lives on the results page and the evidence page.
Leanlab Education is an independent, Kansas City based research nonprofit that runs codesign studies between edtech companies and real classrooms, then evaluates products against the ESSA Tiers of Evidence. Their certifications are built into third-party directories including the ISTE Edtech Index, so the verdict travels with the intervention wherever a district researches it.
Leanlab does not partner with edtech companies for marketing. They partner with them for research, and they say no to companies whose evidence does not hold up. That is what makes a yes worth referencing.
ESSA Tier III (Promising Evidence) is an evidence level under the Every Student Succeeds Act supported by a well-designed and well-implemented correlational study with statistical controls for selection bias. It is a step above the entry Tier IV, and it is a level districts can cite to fund an intervention with Title I, Title II, and Title IV dollars.
Leanlab Education, an independent education research nonprofit based in Kansas City, issued the ESSA Tier III Promising Evidence Badge to LUCA, effective June 2026. Leanlab evaluates edtech products against the ESSA Tiers of Evidence and lists certified products in third-party directories, including the ISTE Edtech Index.
Across five schools in Arizona and Pennsylvania, grades 2 through 8, greater LUCA use was significantly associated with stronger spring reading, consistently across every measure of use, after controlling for where students started, grade, and demographics. The effect was largest for students who started furthest behind: in the Pennsylvania sample, struggling readers who used LUCA finished the roughly 15-week pilot about 12.6 words correct per minute ahead of comparable classmates who did not use LUCA.
Yes. ESSA Tier III (Promising Evidence) is a qualifying evidence threshold for many Title I, Title II, and Title IV expenditures. Confirm specific allowability with your district business office and your state education agency, since approved-list rules vary by state.
Tier III (Promising Evidence) is a higher evidence tier than Tier IV (Demonstrates a Rationale). LUCA holds both from Leanlab Education: Tier IV verifies the research-based logic model behind LUCA, and Tier III verifies that an independent study found a meaningful relationship between using LUCA and reading growth.
The full ESSA Tier III study report from Leanlab Education is available on request. Contact LUCA at [email protected] for the credential and the underlying study documentation.
Request the full study report, talk to our pilot team, or run a 30 minute walkthrough with your evaluation committee.