LINCS.ed.gov has many useful resources and discussion groups. Be sure to check this site. Noted here: College and Career Readiness Standards for Adult...

EngageNY.org is developed and maintained by the New York State Education Department (NYSED) to support the implementation of key aspects of the New...

This site may be especially helpful for the ASE level. It was developed for K-12 teachers but provides interesting text sets around literary- and...

This site provides leveled passages, mostly home-grown, written on a breadth of adult-oriented topics. Best for Levels A-D.

This site assesses the readability of websites - just copy and paste the URL. It also gives interesting information on various readability formulas.

This site allows you to use the Lexile Framework to find the level for a whole book. Type the name of a book into the upper right-hand corner of the...

This site allows you to choose from among several different readability formulas, and it formats the passage in a way that can be useful for fluency...

If you have a particular article, passage, or short story you want to use with students, this free website is a good go-to for figuring out if it's in...