If you teach ELLs, you need to read this brief. One of its most important features is a table that shows the three overarching English Language Arts/Literacy CCSS Shifts side by side with the continuum of expertise, according to Achieve the Core, that teachers will need "to ensure that ELLs with varying levels of first language literacy, background knowledge, and English language proficiency can achieve the CCSS."
Important knowledge for everyone, since ALL teachers are teachers of English Learners!