@hawkeye10,
But there is no massive outcry, from the community within that school district, about the survey itself, or the motives behind it.
This is your issue--it's not, apparently, the main issue for the majority of people who live in that school district, or who have children in that high school.
The controversy in this school district really isn't about the survey--it's about how this teacher handled his student's questions about it, and whether he should have been disciplined for what he implied to his students with his remarks .
The teacher was wrong, and quite inaccurate, to characterize responding to this survey as a Fifth Amendment issue for his students--it suggests the school was trying to entrap the students in legal difficulties, it casts aspersions on the motives for the survey, and it communicates distrust for the school system that employs this teacher. It's not a situation where the Fifth Amendment is even applicable. He deserved the reprimand. All he had to tell his students was that they were not compelled to answer the questions.