My answer is a resounding YES. Public schools all across America have become more than places to learn reading, writing, & arithmetic.
They are (and have been for decades) leftwing indoctrination factories. I went through public schools from 1st grade to a college bachelor's degree, and found them to be exactly that way. A semester of graduate school at a state university wasn't much better.
Interesting how it took me decades to unravel myself from all of this indoctrination, and begin to see things clearly. In 1988, I recall my 2 kids saying that they like Michael Dukakis for president over George Bush. Back then, in the classrooms they got teachers advocating for Dukakis. I even went to the polls & voted for Dukakis, all without any of us ever hearing one word about Willie Horton.
The difference was stark, but many people never got the message.
Bush supported the death penalty for first-degree murder, and Dukakis not only opposed the death penalty, but also allowed first-degree murderers to have weekend passes from prison. Willie Horton murdered a boy in a robbery, stabbing him nineteen times. Despite the life sentence, Horton received ten weekend passes from prison. Horton fled, kidnapping a young couple, stabbing the man and repeatedly raping his girlfriend.
So is the situation in public schools any better now than it was in the 1980s ? I think not. It might even be worse, with all the TDS and crazy woke ideologies floating around.
Maybe the answer is homeschooling. Get the kids away from the indoctrinators and teach them yourselves. Millions of people are going that route nowadays.
And I wonder if these schools ought possibly be defunded.
There is nothing to really investigate here.
The proof is in the pudding as to just how Left wing Academia is.
Look at any peer reviewed journal article on the subject and they will all admit a Left-wing bias all through academia, although some of them try to argue that it is no big deal
Or look at all the school organized protests by students. The only ones I have seen are ones to protest guns, climate change, George Floyd, or recently the shooting of Good with her little run in with law enforcement in her car. Could you even imagine kids in public school protesting abortion or being manipulated into changing their sex or protesting the shooting of the unarmed women at the Capital on 1/6? All hell would break loose if they did with demands of a separation of church and state and endless references to Nazis.
And I have my own experiences, back when academia was not as bad as it is today, and I can tell you that the only biases I heard were from the Left.
So, the only question is, what do we do about it?
I always became physically ill when I saw Gretta Thornburg up their crying before the UN as she cried her eyes out saying she had no future and that she should really be in school getting an education, but since she has no future due to global warming, she may as well skip and come there and cry about climate change, over, and over, and over again. That my friend is what you call child abuse.
It reminds me of a lad I read about in school who was told he had two options, he could either protest guns or go to study hall, but he said that he had come for science class because it was time for science class. So, he arrived in his science class alone, and the teachers berated him demanding he either go to study hall or protest. He refuse, and he was severely disciplined for it.
No, school time is for school time and not Left in indoctrination, but the Left has no concerns about the youth getting a good education in the US because they want to destroy the US. Instead of competing globally on an economic level with despotic regimes like communist China and Russia, kids today are too busy trying to decide what gender they are and why they are either a victim or victimizer based on the color of their collective skin.
And guess what, it does not matter if you are in a blue or red state, the students can and all will sing, "Gas the Jews" at any University in your state because the Left owns them, and with no repercussions. however, verbally threaten gays or blacks or trans and you will be expelled immediately.
Left wing education is akin to the Nazi youth, and just like the Nazi youth they are being trained to hate Jews.
You don't HAVE a pay grade, and you can now sulk away with your tail neatly tucked between you legs, having had your debate ass handed to you. 
