Core5 + LETRS: A Powerful Partnership for Accelerating Reading Growth
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When Lexia® Core5® Reading and LETRS® professional learning are used together, educators gain a uniquely strong combination of evidence‑based instruction and adaptive, research‑driven practice. Each program is powerful on its own—but the impact grows even stronger when they work side by side.
Why Core5 Is One of the Most Effective Reading Programs Available
Core5 is backed by one of the strongest research foundations in literacy:
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Over 2.5x more effective than other elementary reading programs
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Supported by 20 peer‑reviewed studies
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Meets ESSA Strong Evidence criteria
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Proven to accelerate learning across grade levels and implementation models
Lexia partners with leading researchers not only to validate Core5’s effectiveness, but also to contribute to the broader science of reading.
Why Core5 Works Even Better in the Hands of LETRS‑Trained Educators
Core5 accelerates learning for students of all abilities—but research shows that its impact grows when educators have LETRS training.
In a recent study:
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Students using Core5 with a LETRS‑trained teacher scored higher in beginning reading ability after one academic year than students using Core5 alone.
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LETRS‑trained educators were more likely to implement Core5 with fidelity, leading to stronger student outcomes.
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Students were more likely to meet Core5 usage recommendations when their teacher had begun or completed LETRS.
This matters because meeting usage recommendations has a direct, measurable impact on student achievement. Students who use Core5 consistently and with fidelity make substantial gains.
Respecting Student and Educator Time
Core5 is designed to deliver meaningful growth without requiring excessive time. Students don’t need hours of daily practice—just consistent use aligned to product recommendations and informed by LETRS‑aligned instructional decisions.
Join the Conversation!
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How have you seen Core5 and LETRS complement each other in your classroom or school?
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What changes have you noticed in student progress when implementing Core5 with LETRS‑aligned instruction?
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What questions do you have about using Core5 or LETRS together?
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What tips would you share with educators who are using both for the first time?
Together, Core5 and LETRS create a powerful cycle: Educators deepen their knowledge. Students receive stronger instruction. Core5 personalizes practice. Everyone benefits.