A little more than a quarter of teachers surveyed say their beliefs are well-represented by their union, while one-fifth say their union doesn’t represent their views at all.

That’s according to a survey of 1,000 public school and public charter school teachers released Wednesday by the nonpartisan nonprofit group Educators for Excellence. The data comes as union leaders anxiously await a Supreme Court ruling in the case Janus v. AFSCME, which could allow most public school teachers — as well as other public sector employees — to opt out of paying union dues.