Ariz. Rev. Stat. § 15-252
A. The superintendent of public instruction shall:
B. The superintendent of public instruction may prepare and publish on the web site maintained by the department of education a list of the top elementary schools in this state, the top junior high or middle schools in this state, the top high schools in this state and the top charter schools in this state based on the school's academic gains according to measures selected by the department of education. The number of top schools determined by the department of education in the 2007-2008 school year shall be limited to the top fifty schools in each category prescribed in this subsection. After the 2007-2008 school year, the department of education may include more than fifty schools in any category prescribed in this subsection if more than fifty schools in that category meet the selection criteria established for the top fifty schools in that category in the 2007-2008 school year. Academic gains shall be expressed in terms of percentile ranking in percentile points and shall be appropriately weighted for scientific validity. The superintendent of public instruction may make technical adjustments to the information prescribed in this subsection that are necessary for purposes of comparability of data, and the superintendent shall post an explanation of these technical adjustments on the department's web site. The superintendent may measure and post the following information with respect to the top fifty schools in each category prescribed in this subsection: