Ask Teacher for Parent Volunteer Candidates
Here is rough draft of part of a letter you could send out to your teachers in all grades.
You have interacted with your parents for most of the year. The PTSO would like to ask if you could recommend a few parents that you feel would make a positive impact in our organization. Sometimes all it takes is for a personal request to join. We would like to send a personal note, followed up by a phone call to get some new parents motivated.