Lexile® and Quantile® Measures

The Lexile® Framework for Reading and Quantile® Framework for Mathematics have been linked to the CAASPP Smarter Balanced English language arts/literacy (ELA) and mathematics assessments. Students who complete these assessments will receive Lexile and Quantile measures on their Student Score Report (SSR).

Lexile® measures indicate students' reading abilities and Quantile® measures indicate students' readiness for instruction in mathematics. The Lexile and Quantile Hub contains tools and resources that tie Lexile and Quantile measures directly to learning and instructional resources.

Links Description
Lexile and Quantile Hub (TOMS SSO access) Educators with a TOMS account can use their Single-Sign On credentials to access the Lexile & Quantile Hub with premium resources.
Lexile and Quantile Hub (School-Affiliated Email access) Educators that do not have Single Sign-On Credentials—can register with an affiliated school district email to access the premium resources.


Introducing Lexile and Quantile Measures—An overview of Lexile and Quantile measures and an introduction to the Lexile & Quantile Hub. This document is intended for local educational agencies (LEAs) to use to maintain consistent messaging about Lexile and Quantile measures and available resources.

Understanding the Lexile Framework for Reading

There are two kinds of Lexile measures: Lexile text measures and Lexile reader measures. Lexile text measures are assigned to a book or text material to describe how challenging a text is to comprehend. Lexile reader measures are based on a student's Smarter Balanced ELA score and indicate the level of difficulty of materials that a particular student can read and understand. With the help of Lexile measures, parents/guardians and educators can find reading materials at the appropriate difficulty level for students and monitor their growth in reading over time.

Lexile measures are expressed as numbers followed by an “L” (for example, 850L) and range from below 0L for beginning readers and text to above 1600L for advanced readers and text. Comparing a student’s Lexile measure with the Lexile measure of what they are reading helps gauge the “fit” between a student’s ability and the difficulty of text. Therefore, connecting students with books in their Lexile range – 100L below to 50L above their reported Lexile measure – provides an ideal level of reading challenge.

Parents and guardians can refer to the MetaMetrics Lexile Parent Guide and MetaMetrics About Lexile Measures for Reading web page for additional information about Lexile measures.

Understanding the Quantile Framework for Mathematics

There are two types of Quantile measures: a measure for students and a measure for mathematical skills and concepts. The student measure is based on a student’s Smarter Balanced Mathematics score and describes a student’s mathematical ability; specifically, it describes the mathematics skills the student likely already understands and what the student is ready to learn in the future. The skill measure describes the difficulty, or demand, in learning the skill. With the help of Quantile measures, parents and educators can identify the mathematical skills needed to support students’ learning and monitor their growth in mathematics over time.

Quantile measures are expressed as numbers followed by a “Q” (for example, 850Q) and range from emerging mathematician (below 0Q) to above 1600Q. The Quantile Framework spans the developmental continuum from the content typically taught in kindergarten to Algebra II, Geometry, Trigonometry, and Pre-calculus.

Parents and guardians can refer to the MetaMetrics Quantile Parent Guide and What is a Quantile Measure? web page for additional information about Quantile measures.

Available Lexile & Quantile Tools

Looking for short videos on how to access and utilize the Lexile and Quantile Hub Tools? Check out the Utilizing Lexile & Quantile Measures Video Library. Additional videos will be coming soon!

Tool Descriptions

Lexile® Find a Book

Search among over half a million books using the Find a Book book browser that:

  • Offers previews of challenging words and their definitions for each book.
  • Identifies the Lexile level and vocabulary by chapter for over 1,600 popular books.
  • Creates and manages personal book lists that can be shared.
  • Searches by a student’s Lexile measure or range, grade level or interests.
Lexile Analyzer®

Paste or type in text of 1,000 words or less to discover:

  • The Lexile range for the text.
  • Early Reading Indicator information for texts 650L and below.
  • Lists of similar books.
  • Challenging words highlighted in the text along with their definitions, parts of speech, example sentences.
  • Toggle to Spanish to paste or type text in Spanish and get a Lexile range.
Lexile® WordLists Create your own customized lists of consequential words from a collection of 40 million words based on general and academic domain K-12 vocabulary. Lists can be downloaded and printed.
Lexile® & Quantile® Career Database Identify the Lexile level and/or Quantile level associated with the reading and/or math demands of a particular career in this new tool. - Limited to 12 searches per month (per registered user)
Lexile® Grade Level Charts and Quantile® Grade Level Charts See how a large sample of students in grades 1-12 who were administered tests that reported Lexile and/or Quantile measures performed based on this 2010–2016 research. Interactive charts are provided for descriptive purposes only and are not intended to be interpreted as state performance standards.
Lexile® Growth Planner and Quantile® Growth Planner

Chart a student’s reading and math growth across different annual state assessments and forecast future growth. With the Growth Planners, you can:

  • Forecast college and career readiness with Lexile and Quantile measures.
  • Compare individual student results to national student performance.
  • Explore career options along with expected reading/math demands.
  • View national, state and regional career information.
  • Access resources to support growth in reading and math.
Lexile® Measures Manager and Quantile® Measures Manager Determine a student's optimal reading or math measure when two assessments have resulted in significantly differing Lexile or Quantile measures.
Quantile® Math@Home Access free math resources that support textbook lessons or topics a student is studying in school. Search for resources by Quantile measure, state, grade or keyword. Save and share favorite resources.
Quantile® Math Skills Database View math skills and concepts associated with your state’s standards or search for math skills and free resources by keyword, Quantile measure or content strand. Save and share favorite resources.
Quantile® Teacher Assistant Find free resources associated with state standards appropriate for students based on their Quantile measure. Save and share favorite resources.

Additional Information

View a complete listing of the assessments and products that report Lexile and Quantile measures.

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