Getting Ready for a New Set of Tests and Accommodations Rules. Oy.

Because students in the graduating classes of 2017, 2018, and 2019, have not had the full exposure to curriculum aligned to the Common Core State Standards in English Language Arts/Literacy, and mathematics, the composite score for the required assessments for high school graduation should be modified. A sliding scale based on a comparability study of the HSAs, and the new PARCC assessments, for the graduating classes of 2017, 2018, and 2019 is recommended. 

Maryland PARCC Q&A
Montgomery County Schools Asking to Delay PARCC Tests 
PARCC Accommodations Manual, Nov. 2014