Understanding Lexile® Assessment Measuring

If Lexile® Assessments are available with your license, note that there are two kinds of Lexile® measures:

  • The Lexile® reader measure: Students receive a Lexile® reader measure as a score from a reading test - it describes the student’s reading ability.
  • The Lexile® text measure: Books and other texts receive a Lexile® text measure from a software tool called the Lexile® Analyzer - it describes the book's reading demand or difficulty.

Both of these measures are on the same scale.

When used together, these measures can help match a reader with reading material that is at an appropriate level of difficulty, or they can help give you an idea of how well a reader will comprehend a section of text. The Lexile® reader measure can also be used to monitor a reader's growth in reading ability over time. Lexile® helps readers grow and helps keep parents and teachers informed.

When a Lexile® text measure matches or is in the range of a Lexile® reader measure, this is called a targeted reading experience. The reader will encounter some level of difficulty with the text, but not enough to get frustrated. This is the best way to grow as a reader - reading text that's not too hard but not too easy.

From "MetaMetrics® is an educational research organization focused on improving education for learners of all ages. For over twenty years, their work has been increasingly recognized for its distinct value in differentiating instruction and personalizing learning. Their research on postsecondary reading demands, for example, informed the Common Core State Standards for college- and career-readiness. Their researchers and psychometricians publish their findings in hopes of better informing the public about important educational issues and topics, in order to potentially influence policy makers."

For more information on Lexile® Measures, see Understanding Lexile® Measures on