@Kathy **********************
, she would need to go to a thai consulate and apply for a Non-O visa (just like she did before) using the same documentation she did before.
She can go to any thai consulate she wants to as long as she meets the requirements of that consulate to issue a Non-O visa based on being the parent of a child enrolled in school here on an ED visa.
I'd say start looking at the requirements at the various thai consulates in the area.