But DC already had standards, before DC adopted the Common Core standards.
How would the Common Core standards, vs. the standards that DC had before the Common Core standards, have changed the situation?
The CC standards are new. The other teachers in the building would probably be trying to figure things out themselves with the new CC. They would not be able to help this new teacher much if he had questions about the standards or if he asked for materials or asked what to expect in relation to the standards. The institutional knowledge is just not there with CC. Nobody has it.
Second, and this isn't just about the standards themselves, the testing is now connected to teacher evaluations. That would cause a big "push" on the teacher and much anxiety. Having an anxiety ridden teacher in the classroom causes the students to become nervous as well. This causes all kinds of problems. A calm and more relaxed environment is harder to attain. I am sure many of those students came from pretty difficult circumstances and walking into another one was not helpful.
Also, the CC standards are supposedly higher level than the older DC standards. That could cause the bar to be set too high for these students. I'm not familiar with the DC standards so I can't speak to that part.
One thing is for sure, the standards would not be a positive help in the behavior management situation. Many students who come from "unconventional" homes need to learn appropriate ways to gain attention (unfortunately many have not had much attention given to them before they arrive).