Walton High School was the top-performing high school in Cobb County for the 2012-13 school year, according to state education data released Monday.

Hightower Trail ranked top among middle schools in Cobb while Rocky Mount garnered first for elementary schools, based on information released by Georgia's Department of Education.

Schools and districts are receiving grades through the state’s College and Career-Ready Performance Index, which uses student test scores, academic progress and closing the gap in performance between groups of students to come up with a numerical grade of zero to 110.

Check back for more updates on other school districts across the metro area. To get a look at all the results for schools in Cobb and across the metro area, check out MyAJC.com

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Georgia Tech graduates celebrate during spring commencement in May, and the school's growing enrollment helped contribute to the University System of Georgia recording record highs for degrees conferred this fiscal year. (Hyosub Shin/AJC)

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Corbin Spencer, right, field director of New Georgia Project and volunteer Rodney King, left, help Rueke Uyunwa register to vote. The influential group is shutting down after more than a decade. (Hyosub Shin/AJC 2017)

Credit: Hyosub Shin