Now you mention "college" that's different. Those are adults not kids. Emailing adults is different from emailing a kid in regular school, but it should be done cautiously and as limited as possible.
A lot of what you're saying still does not make sense. You mention "college" students, and now you're trying to mix in parents. In college the students are all adults and parental consent is not needed as much.
Strangely you mention "college" students then you go back into speaking of a school district. Which makes it hard to believe anything you're saying. Colleges and Universities are not under the jurisdiction of any school districts. They are entities unto themselves.