This issue in focus.

• Author: Zack, Ian

Dear teachers,

According to the Common Core State Standards, a key component of career and college readiness is the ability to wrestle with complex texts. One measure of complexity that experts cite--and that many of you say you're using--is the Lexile score, a readability rating developed by the educational research firm MetaMetrics. We're pleased to announce that our Teacher's Guide now includes the Lexile score for most articles. These scores make it easier than ever for you to find rigorous texts at just the right levels for your students.

Lexile is certainly not the only...