Reading Inventory Lexile Chart 2025. The development of the lexile framework was based on decades of reading research that examined how students interact with text and how various linguistic features. (for background about this assessment, see test segments.

The lexile framework® for reading is a scientific approach to measuring both reading ability and the text complexity of reading materials on the same developmental scale. The development of the lexile framework was based on decades of reading research that examined how students interact with text and how various linguistic features.