What is the difference between the Lexile and ATOS 2000 scales?
Although the ATOS 2000 scale has a range similar to that of the Lexile scale, it is NOT the Lexile scale and SHOULD NOT be interpreted as such. The Lexile scale is a developmental scale for measuring reader ability and text complexity, ranging from below 200L for beginning readers and beginning-reader materials to above 1700L for advanced readers and materials. Both Lexile reader measures and Lexile text measures can be placed on the same Lexile scale. More than a decade of research went into developing The Lexile Framework for Reading—so that students’ Lexile measures can be used to match them with appropriate reading materials at the right Lexile level. Lexile measures are one of the most widely adopted reading measures in use today. A list of assessments and reading programs that utilize the Lexile scale to report Lexile measures can be found on the following Lexile.com pages: State Assessments; Norm-Referenced & Interim/Benchmark Assessments; Spanish Assessments; International Asse
