North Carolina’s PTA is holding its annual convention and the group’s welcome for the state’s schools superintendent is getting some opposition from some members.

The North Carolina Parent Teacher Association holds its annual convention in Charlotte on Friday and Saturday with a focus on leadership. The state PTA is a century-old volunteer organization advocating for students. There are nearly 1,000 Parent Teacher Associations in schools across the state.

An online petition launched last week urges the association to rescind its speaking invitation to State Superintendent Mark Johnson. About 100 people have backed the drive, saying Johnson is largely silent about increasing public school funding and supporting teachers but often advocates for charter schools and vouchers that help students attend private schools.