The phrase "independent charters" refers to the ability of certain organizations or schools to operate under their own set of rules and guidelines rather than following the regulations set by a larger governing body or authority. Full definition
We realized that continued growth of independent charter schools at this rate was barely going to make a dent. (greendot.org)
It's also the same argument a group of independent charter school leaders made earlier this week when they threw their support behind renewal of mayoral control. (politico.com)
I had the unique opportunity to help craft the direction for independent charter schools for years to come. (nwphs.org)