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E. H. Butler Library, Buffalo State, The State University of New York

Children's Literature Comprehensive Database: Reading Measurements

Reading Measurements in CLCD 

Lexile Measurement 

The Lexile® Framework for Reading was created by MetaMetrics® to measure the reading challenge presented by a text. In contrast to a district's age-based guidelines for what students should read, a Lexile measure is quantitative. Measures range from below 200L to above 1700L, and are based on both reading ability and text difficulty.

Lexile Measurements scale: Grade 1: 190L-530L, Grade 2-3: 420L-820L, Grade 4-5: 740L-1010L, Grade 6-8: 925L-1185L, Grade 9-10: 1050L-1335L, Grade 11-12: 1185L-1385L

The Lexile® Framework for Reading is a scientific approach to reading and text measurement. There are two Lexile measures: the Lexile reader measure and the Lexile text measure. A Lexile reader measure represents a person’s reading ability on the Lexile scale. A Lexile text measure represents a text’s difficulty level on the Lexile scale. When used together, they can help a reader choose a book or other reading material that is at an appropriate difficulty level. The Lexile reader measure can also be used to monitor a reader’s growth in reading ability over time.

It is important to note that the Lexile measure of a book refers only to its text difficulty. A Lexile measure does not address the content or quality of the book. A Lexile measure is based on two strong predictors of how difficult a text is to comprehend: word frequency and sentence length. Many other factors affect the relationship between a reader and a book, including its content, the age and interests of the reader, and the design of the actual book. The Lexile measure is a good starting point in the book-selection process, but these other factors should be considered when making a decision about which book to choose.

Scholastic Measures
  • Scholastic Interest Level: Interest level indicates that students in these grade levels are most likely to be engaged by the book's content and approach 
  • Scholastic Reading Level: Grade plus month reading level for the child, such as 4.2 for grade four and two months
  • Scholastic Point Range: The amount of scholastic reading points that a book is worth
ATOS Text Complexity (AR) 
  • The ATOS readability formula is a research-proven tool to guide students to appropriate-level books. ATOS takes into account the most important predictors of text complexity—average sentence length, average word length, and word difficulty level.
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