As South Carolina overwrites the common core standards, the committee charged with the task wants citizens to help.
The S.C. Education Oversight Committee has set up an overly-complex survey at http:scstandards.org. It appears going to the Appendix at the bottom of the language page and Appendix at the bottom of the math page and commenting might be the easiest way to complete the survey. Within the Appendix, you are able to review the actual material.
Comments can also be left on the last page which is labeled "Exit." However, they do want the comments to be grade-level appropriate.
The survey is in-depth and not for the faint of heart. But it could be a good starting point.