[Sopater]

the school knew this was entirely wrong, or they would not have had the students sign a confidentiality agreement

The school only admitted that it was the confidentiality agreement that was a mistake. They didn't say anything about the material presented being wrong.

[Abby4116]

The school only admitted that it was the confidentiality agreement that was a mistake. They didn't say anything about the material presented being wrong. They didn't have to say it. There would not have been a mistake like that made for math, social studies, English class etc.