Huh? Why in the world do you think removing unionisation will result in better qualified people? The only thing it will do is reduce the salaries. Their already low salaries, might I add. And when that the salaries are lower more qualified people will flock to those jobs, right?<p>By the way the study did not correlate for teachers math ability but for their math anxiety. I.e. they were presumably able to master the material they just felt anxious dealing with numbers and the students were able to subconsciously pick up on that.<p>And in  general you are not likely to get any math wizzes as elementary school teachers. These are usually people that do their jobs because they like kids. Analytical people whether male or female are not usually the kind of people that consider being in a roomful of 30 children all day their dream career.