To be fair, not all charter schools are conservative.

There's a group of charter schools in my area that cater to the extreme fringe of the left and are just as crazy:

• There are lines on all floors of the schools, and students must stay on those lines when travelling from class to class at all times. If a student is spotted not walking on the line, they can receive disciplinary action. (I once made a student cry because I saw him walking in the halls to the bathroom while not on the line and he thought I was a staffer who was going to turn him in and give him detention, which is how I found out this even exists)
• The school is staffed almost entirely by members of the LGBTQ community. While this in and of itself is not a bad thing, they do not try to hide the fact that they believe that being so heavily staffed by LGBTQ members means that they're "woke" (in the stereotypical sense of the word) and therefore better than you. These people are the reason why the "woke" stereotype as envisioned by the GOP exists, to ridiculous extremes. They make no attempt to hide the fact they believe heterosexuals are "beneath" them, and they act accordingly.
• You know the Trump cult of personality? Picture that, but take out Trump and substitute it with Obama. Ceiling-to-floor murals of the Obama family are everywhere.
• They are constantly butting heads with district officials, in that because they cater so heavily to minority populations, the rules simply don't apply to them and they should be allowed to do whatever they want.
• Any student with any kind of special needs is not accepted at all, and they will find a reason to get rid of any student who is falling behind and dragging down their averages or develops a need for any kind of services that they are unwilling to provide.

Yes, their teachings, on paper, almost entirely align with the teachings of the left. But their overall methodology -- March in extreme lockstep, no dissention is tolerated, those who disagree are beneath you and therefore "the enemy", worship the "leaders" -- is just as dangerous to our children as the cult on the right.

The bigger issue I'm worried about, as someone else said below, is that these schools can all just cherry pick the best students out of the district to attend their schools (and therefore get all the funding that goes along with them), leaving the school with a higher percentage of underperforming and special needs students, but with even less resources, harming the ability of all of our public school students to get a quality education.

(EDIT: Some people seem to believe that my mention of the LGBTQ issue is some kind of attack on the LGBTQ community. It is not. I am merely saying that the staff has a very high percentage of LGTBQ members and the general demeanor and attitude of the school is that because they are, they are therefore above the community, rather than a part of it, to the point where they end up being an example of the exact "woke" stereotype they don't want to be labelled as. )