This site provides a curated collection of text complexity resources, tools, and research aimed at supporting educators as they guide students learning to read and understand complex text. It was developed by members of CCSSO's English Language Arts Collaborative. Learn more about the ELA Collaborative here.


Discover what text complexity is and why it is important


Examine these informative visualizations of text complexity


Review sample text complexity analyses and learn how to create your own


Learn about effective scaffolds that support students with complex texts


Apply the understanding of text complexity to instructional practices


Draw on a range of supports outlined by research and materials developed by states and organizations


Find answers to common, perplexing questions about text complexity