Lexile
Encyclopedia
The Lexile Framework for Reading is an educational tool that uses a measure called a Lexile to match readers of all ages with books, articles and other leveled reading resources.

Recognized as the most widely adopted measure of reading ability, more than 28 million Lexile measures are reported from reading programs and assessments annually. Thus, about half of U.S. students in grades 3rd through 12th receive a Lexile measure each year. Lexile measures are being used across schools in all 50 states and abroad.

Components of the Lexile Framework

The Lexile Framework for Reading is made up of Lexile reader measures and Lexile text measures, both of which are put on the Lexile scale.

Lexile Scale

The Lexile scale runs from below 0L (Lexile) to above 2000L. Scores 0L and below are reported as BR (Beginning Reader).

Lexile Measure

A Lexile measure is defined as "the numeric representation of an individual’s reading
ability or a text’s readability (or difficulty), followed by an “L” (Lexile)". There are two types of Lexile measures: Lexile reader measures and Lexile text measures. A Lexile reader measure typically is obtained when an individual completes a reading comprehension
Reading comprehension
Reading comprehension is defined as the level of understanding of a text. This understanding comes from the interaction between the words that are written and how they trigger knowledge outside the text. ....

 test. Once a field study has been performed to link Lexile Framework with the test, the individual’s reading score can be reported as a Lexile measure.

For an individual, a Lexile measure is typically obtained from a reading comprehension assessment or program. These range from the adolescent level (DIBELS: Dynamic Indicators of Basic Early Literacy Skills) to the adult level (TABE: Test of Adult Basic Education
Basic education
Basic education refers to the whole range of educational activities taking place in various settings , that aim to meet basic learning needs. According to the International Standard Classification of Education , basic education comprises primary education and lower secondary education...

).
A Lexile text measure is obtained by evaluating the readability of a piece of text, such as a book or an article. The Lexile Analyzer, a software program
Computer program
A computer program is a sequence of instructions written to perform a specified task with a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute...

 specially designed to evaluate reading demand, analyzes the text’s semantic (word frequency) and syntactic (sentence length) characteristics and assigns it a Lexile measure. Over 60,000 Web sites, 115,000 fiction and nonfiction books, and 80 million articles have Lexile measures, and these numbers continue to grow. Over 150 publishers including Capstone Publishers, Discovery Ed, Houghton Mifflin Harcourt, McGraw-Hill
McGraw-Hill
The McGraw-Hill Companies, Inc., is a publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, education, publishing, broadcasting, and business services...

, Pearson PLC
Pearson PLC
Pearson plc is a global media and education company headquartered in London, United Kingdom. It is both the largest education company and the largest book publisher in the world, with consumer imprints including Penguin, Dorling Kindersley and Ladybird...

, Riverside Publishing
Riverside Publishing
Riverside Publishing Company is a leading publisher of clinical and educational standardized tests in the United States, headquartered in Rolling Meadows, Illinois...

, Scholastic Corporation, Simon & Schuster
Simon & Schuster
Simon & Schuster, Inc., a division of CBS Corporation, is a publisher founded in New York City in 1924 by Richard L. Simon and M. Lincoln Schuster. It is one of the four largest English-language publishers, alongside Random House, Penguin and HarperCollins...

, Workman Publishing Company
Workman Publishing Company
Workman Publishing Company is a publisher of primarily non-fiction print and audio books along with calendars with annual sales of over US$25 million. Located in New York City, New York, USA, the publisher works under several imprints with offices located throughout the United States. Peter...

, and World Book offer certified Lexile® text measures for their materials.

The maker claims that noting the Lexile measure of a text can assist in selecting “targeted” materials that present an appropriate level of challenge for a reader — not too difficult to be frustrating, yet difficult enough to challenge a reader and encourage reading growth.

There is no direct correspondence between a specific Lexile measure and a specific grade level.

History

The genesis of the Lexile Framework for Reading can be traced back to work that A. Jackson Stenner, MetaMetrics chairman and CEO, was performing for the national evaluation of Head Start, when he had to compare different programs from across the country that used different outcome measures. These different outcome measures were due to the different tests that were used to measure academic skills.

The development of the Lexile Framework was fueled by conversations and comments from Dr. John B. Carroll (UNC-Chapel Hill) and Dr. Benjamin Wright (University of Chicago), and was done with mathematical and psychometrical assistance from Dr. Donald S. Burdick, associate professor emeritus of Statistical Science, Duke University, and current senior scientist at MetaMetrics.

The Lexile Framework was developed by MetaMetrics
MetaMetrics
MetaMetrics is a privately held educational measurement and research organization. The psychometricians at MetaMetrics have developed The Lexile Framework for Reading, The Lexile Framework for Writing, and The Quantile Framework for Mathematics. The Lexile measures from the Lexile Framework are...

 co-founders Stenner and Malbert Smith III, Ph.D. The initial funding for the development of the Lexile Framework was provided by the National Institute of Health through the Small Business Innovation Research grant program. Over a twelve-year period, Stenner and Smith received a total of five grants.

The measurement ideas embedded in the Lexile Framework can be found in two early articles by Drs. Stenner and Smith, “Testing Construct Theories” (1982) in Perceptual and Motor Skills and “Toward a Theory of Construct Definition”(1983) in the Journal of Educational Measurement.

Independent Evaluations of The Lexile Framework for Reading

In Mesmer's Tools for Matching Readers to Texts: Research Based Practices, she stated that the Lexile Framework for Reading was valid, reliable, and had "excellent psychometric properties." Mesmer mentioned a study by Walpole et al. (2006) that reported that the Lexile Framework was used to successfully match the participants to text 93% of the time. She also noted that the framework has been praised by reading experts.

In 2002, the Lexile Framework was evaluated by Dr. Dale Carlson. The independent consultant found that the Lexile Framework had a "well-delineated theoretical foundation." Both Carlson and Mesmer have remarked on the positive and unique characteristic of having both the student and text on the same scale.

In 2001, the National Center for Educational Statistics (NCES) formally reviewed Lexile measures. The report acknowledged the science behind Lexile measures: “The panel affirmed the value of both sentence length and word frequency as overall measures of semantic and syntactic complexity....” Additionally, according to one panel member, the Lexile Framework appears “…exceptional in the psychometric care with which it has been developed; the extent of its formal validation with different populations of texts, tests, and children; in its automation; and in its developers’ continual quest to improve it.”

Criticisms

Stephen Krashen, prominent educational researcher in language acquisition and professor emeritus at the University of Southern California, raised serious concerns with the Lexile rating system in his article, “The Lexile Framework: Unnecessary and Potentially Harmful.” Krashen argues that a reading difficulty rating system limits children’s choices and steers them away from reading books in which they may be interested.

Furthermore, like most reading formulas, the formula used to determine a book’s Lexile level can often lead to a flawed rating. For example, The Library Mouse, by Daniel Kirk, is a 32-page children’s picture book rated by Amazon.com as “for ages 4-8” and has a Lexile score of 830. However, Stephenie Meyer’s 498-page, young adult novel Twilight only garnishes a Lexile score of 720. Similarly, Beverly Cleary’s Ramona Quimby, Age 8, has a Lexile score of 860, while Michael Crichton’s Jurassic Park only has a score of 710.

Dr. Elfrieda H. Hiebert, Professor of Educational Psychology at University of California, Berkeley, noted in her study, "Interpreting Lexiles in Online Contexts and with Informational Texts," “The variability across individual parts of texts can be extensive. Within a single chapter of Pride and Prejudice, for example, 125-word excerpts of text (the unit of assessments used to obtain students’ Lexile levels) that were pulled from every 1,000 words had Lexiles that ranged from 670 to 1310, with an average of 952. The range of 640 on the LS [Lexile Scale] represents the span from third grade to college.”

Dr. Hiebert also demonstrated that slight changes in punctuation, such as changing commas to periods, resulted in “significant reclassification on the LS [Lexile Scale].

Besides limiting children’s reading choices and misrepresenting books’ reading difficulty, adoption of the Lexile Scale has had other negative effects, but more at a systemic level. When school districts and states began to mandate specific readability programs, textbook publishers responded by manipulating texts to tailor them to the requirements of the readability formulas.

Furthermore, the Lexile Framework costs states and school districts valuable resources. Even though other readability formulas, such as the Flesch-Kincaid used in Microsoft Word’s software, are widely used to establish reading levels and difficulty, the Lexile Scale is the major method of establishing text difficulty in American schools. However, unlike readability formulas of the past, MetaMetrics, the creator of the Lexile Framework, “retained the processing of readability as intellectual property, requiring educators and other clients to pay for their services to obtain readability levels.”

Lexile Measures and The Common Core Standards

Lexile measures are cited in the U.S. Common Core State Standards for English Language Arts to provide text complexity grade and corresponding Lexile ranges. These grade and Lexile ranges are used to help determine at what text complexity level students should be reading to help ensure students are prepared for the reading demands of college and careers.

Examples of books with Lexile measures

Title Author Lexile
The Cat in the Hat
The Cat in the Hat
The Cat in the Hat is a children's book by Dr. Seuss and perhaps the most famous, featuring a tall, anthropomorphic, mischievous cat, wearing a tall, red and white-striped hat and a red bow tie. He also carries a pale blue umbrella...

Dr. Seuss
Dr. Seuss
Theodor Seuss Geisel was an American writer, poet, and cartoonist most widely known for his children's books written under the pen names Dr. Seuss, Theo LeSieg and, in one case, Rosetta Stone....

260L
Clifford the Small Red Puppy Norman Bridwell
Norman Bridwell
Norman Bridwell is an American author and cartoonist, best-known for the Clifford the Big Red Dog series of children's books. Bridwell attended John Herron School of Art in Indianapolis, Indiana and Cooper Union in New York City. He currently resides on Martha's Vineyard, MA, where he continues to...

330L
The Very Hungry Caterpillar
The Very Hungry Caterpillar
The Very Hungry Caterpillar is a children's picture book designed, illustrated and written by Eric Carle, first published by the World Publishing Company in 1969, later published by Penguin Putnam. The book follows a caterpillar as it eats its way through a wide variety of foodstuffs before...

Eric Carle
Eric Carle
Eric Carle is a children's book author and illustrator who is most famous for his book The Very Hungry Caterpillar, which has been translated into over 50 languages...

460L
The Giving Tree
The Giving Tree
The Giving Tree, first published in 1964 by Harper and Row, is a children's book written and illustrated by Shel Silverstein. This book has become one of Silverstein's best known titles and has been translated into more than 30 languages.-Plot:...

Shel Silverstein
Shel Silverstein
Sheldon Allan "Shel" Silverstein , was an American poet, singer-songwriter, musician, composer, cartoonist, screenwriter and author of children's books. He styled himself as Uncle Shelby in his children's books...

530L
Charlotte's Web
Charlotte's Web
Charlotte's Web is an award-winning children's novel by acclaimed American author E. B. White, about a pig named Wilbur who is saved from being slaughtered by an intelligent spider named Charlotte. The book was first published in 1952, with illustrations by Garth Williams.The novel tells the story...

E. B. White
E. B. White
Elwyn Brooks White , usually known as E. B. White, was an American writer. A long-time contributor to The New Yorker magazine, he also wrote many famous books for both adults and children, such as the popular Charlotte's Web and Stuart Little, and co-authored a widely used writing guide, The...

680L
Twilight (novel)
Twilight (novel)
Twilight is a young-adult vampire-romance novel by author Stephenie Meyer. It is the first book of the Twilight series, and introduces seventeen-year-old Isabella "Bella" Swan, who moves from Phoenix, Arizona to Forks, Washington and finds her life in danger when she falls in love with a vampire,...

Stephenie Meyer
Stephenie Meyer
Stephenie Meyer is an American author known for her vampire romance series Twilight. The Twilight novels have gained worldwide recognition and sold over 100 million copies globally, with translations into 37 different languages...

720L
Where the Wild Things Are
Where The Wild Things Are
Where the Wild Things Are is a 1963 children's picture book by American writer and illustrator Maurice Sendak, originally published by Harper & Row. The book has been adapted into other media several times, including an animated short in 1973 , a 1980 opera, and, in 2009, a live-action feature film...

Maurice Sendak
Maurice Sendak
Maurice Bernard Sendak is an American writer and illustrator of children's literature. He is best known for his book Where the Wild Things Are, published in 1963.-Early life:...

740L
Harry Potter and the Philosopher's Stone
Harry Potter and the Philosopher's Stone
Harry Potter and the Philosopher's Stone is the first novel in the Harry Potter series written by J. K. Rowling and featuring Harry Potter, a young wizard...

J. K. Rowling
J. K. Rowling
Joanne "Jo" Rowling, OBE , better known as J. K. Rowling, is the British author of the Harry Potter fantasy series...

880L
A Tale of Two Cities
A Tale of Two Cities
A Tale of Two Cities is a novel by Charles Dickens, set in London and Paris before and during the French Revolution. With well over 200 million copies sold, it ranks among the most famous works in the history of fictional literature....

Charles Dickens
Charles Dickens
Charles John Huffam Dickens was an English novelist, generally considered the greatest of the Victorian period. Dickens enjoyed a wider popularity and fame than had any previous author during his lifetime, and he remains popular, having been responsible for some of English literature's most iconic...

990L
The Hobbit
The Hobbit
The Hobbit, or There and Back Again, better known by its abbreviated title The Hobbit, is a fantasy novel and children's book by J. R. R. Tolkien. It was published on 21 September 1937 to wide critical acclaim, being nominated for the Carnegie Medal and awarded a prize from the New York Herald...

J. R. R. Tolkien
J. R. R. Tolkien
John Ronald Reuel Tolkien, CBE was an English writer, poet, philologist, and university professor, best known as the author of the classic high fantasy works The Hobbit, The Lord of the Rings, and The Silmarillion.Tolkien was Rawlinson and Bosworth Professor of Anglo-Saxon at Pembroke College,...

1000L
Gone with the Wind
Gone with the Wind
The slaves depicted in Gone with the Wind are primarily loyal house servants, such as Mammy, Pork and Uncle Peter, and these slaves stay on with their masters even after the Emancipation Proclamation of 1863 sets them free...

Margaret Mitchell
Margaret Mitchell
Margaret Munnerlyn Mitchell was an American author and journalist. Mitchell won the Pulitzer Prize for Fiction in 1937 for her epic American Civil War era novel, Gone with the Wind, which was the only novel by Mitchell published during her lifetime.-Family:Margaret Mitchell was born in Atlanta,...

1100L
A Brief History of Time
A Brief History of Time
A Brief History of Time is a popular science book written by renown physicist Stephen Hawking and first published by the Bantam Dell Publishing Group in 1988. It became a best-seller and has sold more than 10 million copies...

Stephen Hawking
Stephen Hawking
Stephen William Hawking, CH, CBE, FRS, FRSA is an English theoretical physicist and cosmologist, whose scientific books and public appearances have made him an academic celebrity...

1290L


More examples are available here.

Lexile Use

Over 40 reading assessments and programs report Lexile measures, including many popular instruments from Scholastic, Pearson, CTB/McGraw-Hill and Riverside Publishing, as well as a growing number of year-end state assessments.
Reading Assessments that Report Lexile Measures
  • American Education Corporation: A+ LearningLink assessment
  • Aprenda 3
  • Arizona's Instrument to Measure Standards
    Arizona's Instrument to Measure Standards
    Arizona's Instrument to Measure Standards is a standardized test administered by the state of Arizona. AIMS is a standards based assessment aligned to the Arizona Academic Content Standards.-Test contents:...

  • California Standardized Testing and Reporting (STAR) Program
  • Criterion-Referenced Competency Tests
    Criterion-Referenced Competency Tests
    The Criterion-Referenced Competency Tests are a set of tests administered at public schools in the state of Georgia that are designed to test the knowledge of first through eighth graders in reading, English/language arts , and mathematics, and third through eighth graders additionally in science...

  • DIBELS
    DIBELS
    The DIBELS is a set of procedures and measures for assessing the acquisition of K-6 literacy skills...

  • End of Course Test
    End of Course Test
    The End of Course Test is an academic assessment conducted in many states by the State Board of Education. Georgia, for example, tests from the ninth to twelfth grades, and North Carolina tests for any of the four core class subjects .North Carolina schools administer an EOCT in English I, Algebra...

  • ERB: Comprehensive Testing Program, 4th Edition (CTP 4)
  • Florida Assessments for Instruction in Reading (FAIR)
  • Gates-MacGinitie Reading Tests, Fourth Edition
  • Georgia High School Graduation Test
    Georgia High School Graduation Test
    The Georgia High School Graduation Test, or GHSGT, administered to all students in the eleventh grade, determines whether or not a student will graduate from a high school in the US state of Georgia.The test consists of five subject areas:...

  • Hawaii State Assessment
  • Illinois Standards Achievement Test
    Illinois Standards Achievement Test
    The Illinois State Achievement Test measures individual student achievement relative to the Illinois Learning Standards. Results of this score are applied to the No Child Left Behind Act, for purposes of identifying failing schools....

  • Iowa Tests of Basic Skills
  • Iowa Tests of Educational Development
    Iowa Tests of Educational Development
    The Iowa Tests of Educational Development are a set of standardized tests given annually to high school students in many schools in the United States, covering Grades 9 to 12...

  • Kansas State Assessments of Reading
  • Kentucky Core Curriculum Test (KCCT)
  • The MAT 8
  • Measured Progress: Progress Toward Standards (PTS3) is
  • Minnesota Comprehensive Assessments-Series II
  • New Mexico Standards-Based Assessment (SBA)
  • North Carolina End of Grade Tests
    North Carolina End of Grade Tests
    The North Carolina End of Grade Tests are the standardized tests given to students in North Carolina grades 3-8. Beyond grade 8, there are End of Course Tests for students in grades 9 to 12....

  • Oklahoma Core Curriculum Tests
    Oklahoma Core Curriculum Tests
    The Oklahoma Core Curriculum Tests are standards-aligned tests designed to meet NCLB requirements. The following tests are administered:Additionally, the Oklahoma Core Curriculum Tests report out Lexile measures for students in grades 3-8. A Lexile measure can be used to match readers with targeted...

  • Palmetto Assessment of State Standards
    Palmetto Assessment of State Standards
    The Palmetto Assessment of State Standards is a standards-aligned test designed to meet NCLB requirements. It is administered in grades 3-8 in writing, ELA, mathematics, science, and social studies....

  • Progress in English (GL Assessments)
  • Scantron
    Scantron
    Scantron is an American company based in Eagan, Minnesota, that manufactures and sells machine-readable papers on which students mark answers to academic multiple-choice test questions. To analyze those answers, the machines use image-based data collection software and scanners...

     Performance Series
  • Scholastic Reading Inventory (SRI)
  • South Dakota State Test of Educational Progress
    South Dakota State Test of Educational Progress
    The South Dakota State Test of Educational Progress is a standards-based test designed to meet NCLB requirements. Grades 3-8 and 11 are tested....

  • Standards of Learning
    Standards of Learning
    Standards of Learning ' is a public school standardized testing program in the Commonwealth of Virginia. It sets forth learning and achievement expectations for core subjects for grades K-12 in Virginia's Public Schools...

  • Stanford Achievement Test Series
    Stanford Achievement Test Series
    The current Stanford Achievement Test Series, usually referred to simply as the "SAT 10", is considered the benchmark of excellence in standardized achievement tests utilized by school districts in the United States for assessing children from kindergarten through high school. First published in...

  • Stanford Diagnostic Reading Test, Fourth Edition (SDRT 4)
  • Stanford Learning First
  • Tennessee Comprehensive Assessment Program
    Tennessee Comprehensive Assessment Program
    The Tennessee Comprehensive Assessment Program is the standardized testing program used in public schools in Tennessee.Tennessee schools administer a comprehensive exam to their students at the end of each school year beginning in the third grade. Tests are intended to reflect what each child...

  • TerraNova (test)
    TerraNova (test)
    TerraNova is a series of standardized achievement tests used in the United States designed to assess K-12 student achievement in reading, language arts, mathematics, science, social studies, vocabulary, spelling, and other areas. The test series is published by CTB/McGraw-Hill...

  • Tests of Adult Basic Education (TABE)
  • Texas Assessment of Knowledge and Skills
    Texas Assessment of Knowledge and Skills
    The Texas Assessment of Knowledge and Skills is a standardized test used in Texas primary and secondary schools to assess students' attainment of reading, writing, math, science, and social studies skills required under Texas education standards. It is developed and scored by Pearson Educational...

  • TOEFL
    TOEFL
    The Test of English as a Foreign Language, or TOEFL , evaluates the ability of an individual to use and understand English in an academic setting....

     (Educational Testing Service
    Educational Testing Service
    Educational Testing Service , founded in 1947, is the world's largest private nonprofit educational testing and assessment organization...

    )
  • Total Reader
  • West Virginia Educational Standards Test
    West Virginia Educational Standards Test
    The West Virginia Educational Standards Test is a criterion-referenced test measured student's knowledge of the West Virginia Content Standards. It is designed to meet NCLB requirements. Tests are administered in ELA and mathematics in grades 3-11....

  • Proficiency Assessments for Wyoming Students (PAWS)

Reading Programs that Report Lexile Measures
  • Achieve3000: KidBiz3000 and TeenBiz3000
  • EdGate: Total Reader (TR)
  • Hampton-Brown: The Edge and Insider
  • Houghton Mifflin Harcourt: Earobics
  • Pearson/Longman/Prentice Hall: MyReadingLab
  • Scholastic Reading Counts!, READ 180, and ReadAbout
  • Sopris West: LANGUAGE!
  • Thinkronize: netTrekker d.i.
  • Voyager Expanded Learning: Passport Reading Journeys

Free Tools

Both Barnes & Noble
Barnes & Noble
Barnes & Noble, Inc. is the largest book retailer in the United States, operating mainly through its Barnes & Noble Booksellers chain of bookstores headquartered at 122 Fifth Avenue in the Flatiron District in Manhattan in New York City. Barnes & Noble also operated the chain of small B. Dalton...

’s Lexile Reading Level Wizard and MetaMetrics
MetaMetrics
MetaMetrics is a privately held educational measurement and research organization. The psychometricians at MetaMetrics have developed The Lexile Framework for Reading, The Lexile Framework for Writing, and The Quantile Framework for Mathematics. The Lexile measures from the Lexile Framework are...

Find a Book are free utilities that enable students to find books on subjects that interests them and are within their Lexile range. MetaMetrics also offers two tools free of charge to educators. The organization offers access to the Lexile Analyzer, a software program that is used to determine the Lexile measure of a text, and the Lexile Titles Database Download, a file containing Lexile measures for tens of thousands of books.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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