The response from the school was classic. Barbara P. Jacoby, Chief Communications Officer for the Cherokee County School District put the blame where it belonged. According to the link, in a letter addressed to the parents of all the students she stated:
“In this regard, a River Ridge High School on Thursday, Aug. 31, 2017 erroneously told two students their shirts with campaign slogans were not permitted in class. Her actions were wrong, as the “Make America Great Again” shirts worn by the students are not a violation of our School District dress code. The teacher additionally — and inappropriately — shared her personal opinion about the campaign slogan during class......The school’s Principal immediately met with and apologized to these students and their families.
“While we cannot discuss disciplinary action against a teacher, we can assure you that the students face no disciplinary action. The Superintendent also is instructing all Principals to meet with their teachers and staff to review the dress code and remind them that their political opinions should not be shared with students.”
Now, that's the way to run a school. Great job, Jacoby.