Robert's Rules states that the minutes should reflect actions taken (motions made, votes taken, etc.), not the minutia of the discussions held during the meeting or of reports made.
If your PTO has a website, the minutes could be posted there. Otherwise, make a copy and have it available to any interested party in your school's office.
We are currently in discussion on how the minutes should be written (how much detail) and how they should be posted. The Pres. thinks the minutes should just be a bit more detailed form of the agenda, and others think it should reflect a summary of the discussion ensued. Also, our by-laws do not specifically state that the minutes need to be posted, but the Open Meeting Laws require posting...how should these approved minutes be posted (or not posted)? Any help would be much appreciated.