From OELA website, "English Learner Tool Kit Updated with ESSA references. OELA’s EL Tool Kit was published in 2015 as a companion to support the 2015 Dear Colleague Letter (DCL) produced by the Department of Education, Office for Civil Rights, and the Department of Justice, outlining legal obligations for ELs. Some chapters of the tool kit have been updated related to the Every Student Succeeds Act of 2015 (ESSA).

The English Learner Tool Kit helps state and local education agencies help English Learners (ELs) by fulfilling these obligations.

The Toolkit has 10 chapters (one for each section of the DCL), and contains an overview, sample tools, and resources."

https://www.ed.gov/teaching-and-administration/supporting-students/english-learner-tool-kit-oela