Yes, and it's difficult to get information from charter schools because they are not subject to the same reporting that public schools are. This makes it easy for people take advantage of their opaqueness.
These are a few examples from Los Angeles:
https://www.washingtonpost.com/education/2019/06/17/how-does...
https://patch.com/california/studiocity/la-charter-schools-f...
https://www.scpr.org/blogs/education/2013/04/05/13188/los-an...