Not only am I serious, but I've done it before. There is a thing called Context. Any good teacher with good administrative support would use a thing like that as part of a lesson on Civil Rights. A big part of the Core Curriculum is to provide the students artifacts from the era and allow them to work with them... My job as a teacher is to help them understand how the artifact fits into history. I could build an entire lesson around that paperweight.
Additionally, Your comment is why Tenure is necessary for teachers.
BTW, I am thinking it is 1950's and not 1920's. The "one school comment" goes better with the era between Brown v Board of Education and the rise of Dr. King as a definitive leader of the movement.