School Choice - Charter Schools & Vouchers

Thesis Statements:

Choices like as charter schools and vouchers will lower the public expenditure and drive reform of public schools.

-or-

School choice in the form of charter schools and vouchers result in the public funding of private schools and are not satisfactory methods of reforming public schools.

Some of the issues in this argument:
How are schools funded and does this affect educational quality?
What is school choice and how would it affect public schools?
Would competition from privately operated schools improve education?