MetaMetrics®: The Lexile® Framework for Reading

The Lexile Framework for Reading is a scientific approach to measuring both reading ability and the difficulty of materials on the same developmental scale.

Reading materials get a measure based on factors such as their vocabulary and complexity. Children receive a Lexile reader measure from an assessment at school. Over 35 million students in all 50 states have been given Lexile measures.

A Lexile measure is an important tool to help find reading materials to match and challenge a child’s ability. It also helps teachers personalize learning by providing the best books to boost academic progress and success.

All DK Super Readers titles have a Lexile measure. The table shows the Lexile range for each of our levels.