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The following terms are commonly used in association with the Lexile Framework.

Beginning Reader (BR) Codes

are Lexile codes given to both texts and student scores below 0L. A Lexile measure of BR100L indicates that the Lexile measure is 100 units below 0L. See Lexile Codes.

Early-Reading Indicators

help identify important text features in early reader texts (650L and below) that could present more or less challenge for a learner.

Find a Book

enables users to find books that match a student’s reading level and interests and can be used to check the availability of books at the local library. There are more than 300,000 titles to search on Find a Book at

Lexile Analyzer®

enables registered users to analyze text and generate a Lexile® measure. For early-reading texts (650L and below), the Lexile Analyzer generates information about text complexity and indicators dealing with patterning, sentence construction, vocabulary and decoding. A free, limited version that generates a range for a limited amount of text is available at Professional Lexile Analyzer® is available at

Lexile Analyzer® Editor Assistant™

is a tool to more efficiently and effectively develop leveled text at a particular Lexile level. Users can write and edit text while receiving Lexile measures on-demand, as well as access information on important text characteristics, view revision history, and collaborate with colleagues. More information is available at

Lexile Career Database™

contains Lexile measures for over 400 careers across numerous fields, as well as important descriptive information for each career. With this tool, the reading ability needed for a desired career can be determined and used to inform goal setting.

Lexile Codes

are a two-letter designation before a Lexile text measure that provide more information about the type of book and its age appropriateness. The Lexile codes are:

  • AD: Adult Directed – Better when read aloud to a student rather than having the student read independently.
  • BR: Beginning Reader – Appropriate for emerging readers with a Lexile reader measure below 0L.
  • GN: Graphic Novel – Graphic novels or comic books.
  • HL: High-Low – Content to engage older students who need materials that are less complex and at a lower reading level.
  • IG: Illustrated Guide – Nonfiction materials often used for reference.
  • NC: Non-Conforming – Good for high-ability readers who still need age-appropriate content.
  • NP: Non-Prose – Poems, plays, songs, recipes and text with non-standard or absent punctuation.

Lexile Framework® for Reading

evaluates reading ability and text complexity on the same developmental scale. Unlike other measurement systems, the Lexile Framework determines reading ability based on actual assessments, rather than generalized age or grade levels.

Lexile measures match learners with text, providing an ecosystem for building reading comprehension skills. With Lexile measures, educators and families have a powerful tool for supporting learners as they navigate the path to academic success in reading.

Recognized as the standard for matching learners with texts, more than 35 million students in all 50 U.S. states and from 180 countries around the world receive a Lexile measure that connects them with targeted readings from the more than 100 million articles, books and websites that have been measured. Today more than 65 popular reading assessments and programs and 25 state assessments report Lexile measures. For more information about the Lexile Framework, visit

Lexile Framework for Reading for Spanish Speakers / El Sistema Lexile® para Leer

is the Spanish version of the widely adopted Lexile Framework for Reading. It provides its own developmental scale and measure to connect Spanish learners with resources at the right level of difficulty and in their native language. Spanish Lexile measures help educators, librarians and families select targeted materials and activities that can improve reading ability and monitor reading growth in school, the library and at home. Spanish Lexile measures are available from a growing number of reading assessments and programs, and the number of resources with Spanish Lexile measures continues to increase.

Lexile PowerV® Vocabulary Tool

uses a book or piece of text to generate vocabulary lists within a desired Lexile range to aid comprehension. The tool develops book specific vocabulary lists that contain words that students should know when reading the book. Generated vocabulary lists can be targeted to different reading levels for over 125,000 popular books.

Lexile® range

spans 100L below to 50L above a student’s Lexile measure, and is the optimal range for successful reading practice.

Lexile® scale

ranges from below 0L for beginner level learners and texts to above 1600L for more advanced level learners and texts.

Lexile® Learner Measure

represents a student’s reading ability on the Lexile scale. A student receives a Lexile measure from a variety of reading assessments or a state assessment. The Lexile learner measure can be used to monitor a reader’s growth in reading ability over time. When used together with the Lexile text measure, it can help a learner choose a book or other reading material that is at an appropriate challenge level.

Lexile® Text Measure

represents a text’s difficulty level on the Lexile scale. A Lexile measure is represented by a number followed by an “L” such as “800L.” Over 100 million books and articles have Lexile measures. When used together with the Lexile text measure, it can help a learner choose a book or other reading material that is at an appropriate challenge level.

Lexile Titles Database®

is comprised of over 300,000 fiction and nonfiction titles with Lexile measures.