But if less than half of adults have any kind of college degree and more than half of teachers have a master's, just saying "the teachers are the bottom 20% of

But if less than half of adults have any kind of college degree and more than half of teachers have a master's, just saying "the teachers are the bottom 20% of the class" is, at best, extremely misleading—it's not even the same class as the average non-teacher.