https://phys.org/news/2018-11-teachers-trump.html

"There were many teachers who said they wanted to talk with students about the election and related issues but were also afraid of backlash," said Dunn, who conducted the nationwide questionnaire of more than 700 educators.

In the survey, some teachers said they felt election-related topics weren't appropriate in schools or weren't relevant to their subject. Others felt they shouldn't, or couldn't, share their political affiliations or feelings.