Could you post a link to the recent post? So we'll understand your post better.
HIPAA governs health care providers. The school is not a health care provider but the nurse may be. Depends on the definition given by HIPAA.
Here is a site that gives specifics about HIPAA
http://www.hhs.gov/ocr/privacy/hipaa/understanding/summary/
"Who is Covered by the Privacy Rule
The Privacy Rule, as well as all the Administrative Simplification rules, apply to health plans, health care clearinghouses, and to any health care provider who transmits health information in electronic form in connection with transactions for which the Secretary of HHS has adopted standards under HIPAA (the “covered entities”). For help in determining whether you are covered, use CMS's decision tool."
So the question is, does the nurse "transmit health care information in electronic form in connection with transactions for which the Secretary of HHS has adopted standards." I doubt it but the only way to know is to ask the nurse at the school for which you're concerned.
School records are governed by FERPA, Family Educational Rights and Privacy Acts.
My conclusion is that your question is too broad. To answer this question one must know more specifics about your concern.
Here is a web site that discusses both HIPAA and FERPA, http://www.hhs.gov/ocr/privacy/hipaa/understanding/covere...