Of the 14 city and county school systems analyzed, Cobb County School District placed fifth with a score of 1534, and Marietta City Schools landed in the seventh spot with a score of 1514.
Other than Fulton County, the Decatur City, Cherokee County and Forsyth County school systems ranked ahead of Cobb. Gwinnett Schools System placed below Cobb and above Marietta with an average score of 1526.
Atlanta Public Schools placed last on the list with a score of 1244.
Both Marietta and Cobb school districts scored higher than the state average of 1460 and the national average of 1509. The two systems also increased their scores since last year's data, with Cobb increasing their average score by 11 and Marietta rising by 54.
Cobb students averaged scores of 515 in reading, 519 in math, and 500 in writing. Students at Marietta High School scored averages of 504 in reading, 517 in math, and 493 in writing. Across Georgia, the averages were 490 in reading, 491 in math and 479 in writing. Nationwide scores were 501 in reading, 515 in math and 493 in writing.