ITA. DS/DD had first-hand experience when adoption of Common Core led to a dismantling of the stand-alone GT class to three of the six 5th grade classes for ELA, resulting in a significant lowering of the standards/paces of the ELA class, notwithstanding that a significant portion of the materials are "differentiated." Interestingly, they are the ones who pointed out to me that although the GT population has doubled and many classmates are noticeably nowhere near GT, the materials and assignments themselves are actually more interesting/challenging in middle school, particularly in comparison to 5th grade.