As a pioneer in the Charter school movement, CSUSA is one of the fastest-growing education management organizations in the United States, providing a wide variety of educational choices to over 82,000 students in more than 150 schools across Florida, South Carolina, North Carolina, and Louisiana. Overview: Charter Schools USA (CSUSA) is one of the largest and highest performing education management companies in the United States, proudly serving over 82,000 students in over 150 schools in four states.