I'm often asked during my workshops where teachers can find materials at different reading levels, particularly since the Common Core requires that you find texts at increasingly difficult levels. The CCSS provide exemplars of different texts, as well as some recommended readability formulas, such as the Lexile Framework. However, many teachers want a way to search for materials online at varying levels. This blog post provides a step-by-step description to searching by readability level with Google. It's certainly not linked directly to the Common Core Standards, but it is a tool that can be used to supplement your instruction.