NAPCS codes charter schools for management organizations from the Profiles of For-Profit and Nonprofit Education Management Organizations reports authored by researchers at Western Michigan University and published by the National Education Policy Center at the University of Colorado Boulder. The most recent report can be found here.
• CMO = Charter Management Organization (nonprofit)
• EMO = Education Management Organization (for-profit)
• Freestanding = A charter school that is not affiliated with a management organization (also called independent, mom and pop, stand-alone, etc.)