I remember early in my career when I taught k-12 here in Utah, I would always see a flood of rejected kids from charter near the start of October right after the first term ended. Why? The rule was, in order for these schools to hold onto state funding for students, those students needed to attend for at least one term or else the charter would forfeit state funding.
So charters would hold onto these kids who often needed special accommodations, until the first term ended. Then, they would dump their rejects onto the public school and keep the money. With very few exceptions, these students struggled behaviorally, Socially, and intellectually. That’s why their parents tried the charter school and that’s why the charter school rejected them after one term.
I think Utah has since mended this loophole so the money goes wherever the student goes. But it exposed to me early in my career what a joke charters were. They vet students by requiring parent service hours and student uniforms (disproportionately weeding out minorities) and dumping problem students onto us as soon as they could do so and still hold onto state funding. So public schools were left dealing with problem students without adequate funding. And then pro choice advocates would try to compare my classroom of students 35+ students with varying degrees of issues, races, economic levels, and without adequate state funding To charters with classrooms of 20 students of homogeneous students, required parental participation, and far more state funding per pupil.
Which is funny, Because even with these inherent advantages charters have over traditional public schools, we still consistently over performed them in Utah. When Utah did it’s grading system, overwhelmingly the top schools were public schools. While the failing schools were overwhelmingly charter.