A student's optimal Lexile range is from 100L below to 50L above his or her measure from a reading test. But you don't always have to stay in your Lexile range. Here are some instructional applications for using mistargeted text.
Higher Lexiles can help a reader reach higher:
Advanced and enthusiastic readers can be challenged with high-interest books above their Lexile range.
Lexiles can help a parent know when a child might need help through a hard but interesting book.
Lexiles can also help you find additional books on the same subject at a lower level.
Lower Lexiles can help a reader build skill and confidence:
Struggling and reluctant readers can find easier books to practice with on topics they're interested in.
Combine Lexile range and developmental level to find easier books that are still age-appropriate.
Lexiles can be the safety net to help a reader through a hard but interesting book.
If a school book is too hard, Lexiles can help you find other books on the same subject at a lower level.