We moved to California when I was in the 10th grade.  My parents enrolled me the local public school.   It didn't take long for my parents to realize this was a mistake.  My school was teaching things that I had learned in the 10th grade at my previous school in Washington.  My parents withdrew me from the Public School and enrolled me in a private school.

I was fortunate that my parents could afford a private school education.  This is what vouchers accomplish for parents who are unable to afford a private school education, they give those parents the ability to enroll in a school that will meet their child's educational needs.   

For those who say we should fix public schools, that's impossible.  The control of unions prevent needed reforms and the progressives are too busy pushing their agenda that educating students is a secondary priority. 

What the progressives and those on the left are afraid of is that if parents exercise choice, the left will lose their captive audience.