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Discover Lexile measures, AR levels, guided reading levels, and grade recommendations to find the perfect book for your child or student.
A scientific approach to measuring reading ability and text complexity. Scores range from below 200L for beginning readers to above 1600L for advanced readers.
Indicates grade level difficulty. A book with AR level 4.5 is appropriate for a student in the fifth month of fourth grade.
A leveling system using letters A-Z to indicate text difficulty, commonly used in elementary schools.
A reading assessment tool that measures reading engagement, fluency, and comprehension.
Search our full catalog to find reading level information for any children's book. We have Lexile, AR, and grade level data for thousands of titles.
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