Our metrics power the world’s best education products.

We provide technology that allows your product to personalize learning and accelerate student growth.

Universal, Objective Metrics to Monitor & Predict Growth

We provide scientifically valid measures that allow educators to forecast how students will perform on state assessments.

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The Lexile Framework® for Reading

Lexile measures enable education companies to bring the power of personalized learning to their products and programs by matching readers with texts.

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The Quantile Framework for Mathematics

Quantile measures allow education companies to bring the power of personalized math instruction to their products and programs by matching learners with resources.

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Our Metrics Act as a Compass to Help Learners Navigate Academic Success

We offer companies that partner with us access to a wealth of psychometric experience that can be leveraged to build and implement reading, writing, and mathematics products and assessments.

We provide a solution that is

Scientifically Valid & Research-Based. Our metrics have been validated by hundreds of studies over the past 30 years.
Objective & Ubiquitous. More than 35 million students and over 100 million articles, books, and websites have received our metrics.
Actionable. Because ability level and difficulty of content are measured on the same developmental scale, students can use our metrics to find “just right” resources.

Read our Corporate Brochure and learn more about how we can help you build a better reading, writing or math product today!

Finding the most appropriate books for beginning readers just got easier.

Thanks to extensive research, Lexile measures are now more precise for content used in K–2 classrooms and provide readers with a superior match to texts. Find out more about this latest innovation.