In calculating these ratings, GreatSchools analyzed the 2010-2011 Criterion-Referenced Test (CRT) and High School Proficiency Examination (HSPE) reading, writing, math and science results and compared them to the test results for all Nevada schools with the same grade levels.
If there are no GreatSchools Ratings for a school, the school's test results were either not reported or incomplete. The different student groups are identified by the Nevada Department of Education. If there are a small number of students in a particular group in a school, the state doesn't report data for that group.
Keep in mind that when comparing schools using GreatSchools Ratings, it's important to factor in other information, including the quality of each school's teachers, the school culture, special programs, etc.
GreatSchools Ratings cannot be compared across states, because of differences in the states' standardized testing programs.
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