Because the charter is a legal document, an attorney should review it. It cannot be overemphasized that the sponsor will hold the school accountable to the standards set forth in its own document. Another defining characteristic that sets charters apart from traditional schools is that they are truly accountable. Unlike conventional schools, charters face serious consequences for non-performance. Make the charter a comprehensive document.
Many charters fail to be accepted because they are far too brief, or vague.
Running a school is not an easy task, so describing how one plans to do so should not be. The goal is to impress upon the selected sponsor that your group is capable of organizing and maintaining a school. Not providing sufficient detail in the charter is the quickest way to convince the sponsor you've not thought through the important details. At the same time however, avoid becoming too philosophical and inexact. Be specific, be precise, and most of all, be thorough.