While charter schools provide an alternative to other public schools, they are part of the public education system and are not allowed to charge tuition. Where space at a charter school is limited, admission is frequently allocated by lottery based admissions. Some charter schools provide a curriculum that specializes in a certain field-- e.g. arts, mathematics, etc. Others simply seek to provide a better and more efficient general education than nearby public schools. (I would imagine that in the case of TV, it is provided for the workers children)

Funding
Charter school funding is dictated by the state. In many states, charter schools are funded by transferring per-pupil state aid from the school district where the charter school student resides. The Federal Elementary and Secondary Education Act, Part B, Sections 502 - 511 also authorize funding grants for charter schools. Additionally, charter schools may receive funding from private donors or foundations.

National Center for Education Statistics study
A study released on August 22, 2006 by the National Center for Education Statistics (NCES) found that students in charter schools performed several points worse than students in traditional public schools in both reading and math on the National Assessment of Educational Progress test.

United States Department of Education Study
In its Evaluation of the Public Charter Schools Program: Final Report released in 2003, the U.S. Department of Education found that, in the five case study states, charter schools were out-performed by traditional public schools in meeting state performance standards, but noted: “It is impossible to know from this study whether that is because of the performance of the schools, the prior achievement of the students, or some other factor.