When School invites its students' parents to hold a meeting...

When I was invited to my kids' school for a meeting, it was called a "Parents meeting". In some US schools they have an organisation called a "Parent-Teacher Association" or "PTA" and I guess that meetings of that organisation would be called "PTA meetings", so I imagine that "P-T meetings" might mean "Parent-Teacher meetings". But the abbreviation "P-T" is not a generic or standard one and would not be universally understood. Beware of assuming that very local language practices such as Americanisms are universal.

Thanks.