Summary:
ZIP code 30068 in Marietta, GA is served by the Cobb County School District and contains 6 schools—4 elementary schools, 1 middle school, and 1 high school—serving approximately 6,366 students in a largely affluent area.
The standout performer is Dickerson Middle School, ranked #5 in Georgia with a perfect 100% proficiency in Algebra I and 97.2% in Physical Science. Among elementary schools, Mount Bethel Elementary School and Timber Ridge Elementary School are elite performers, both ranking in the 95th-98th percentile with math proficiency between 80-91%. However, a stark divide exists within the ZIP code: Sedalia Park Elementary School ranks in the 50th percentile with math proficiency as low as 34.6%, while Eastvalley Elementary School sits in the 81st percentile. This gap closely tracks free/reduced lunch rates—Mount Bethel and Timber Ridge have only 7% eligibility, while Sedalia Park has 67% and Eastvalley 42%.
The most concerning trend is at Wheeler High School, which has declined from the 83rd to 65th percentile over three years. While its graduation rate (89.4%) and dropout rate (2.1%) are solid, chronic absenteeism is alarmingly high at 22.7%—nearly 5 points above the state average—and Algebra I proficiency is just 41.5% versus the district's 59.4%. This suggests the strong foundation built at Dickerson Middle School is not fully carrying through to high school. Notably, higher spending does not correlate with better outcomes: Eastvalley spends $17,981 per student yet underperforms Mount Bethel, which spends $16,389. The absenteeism-achievement connection is clear across all schools, with low-absenteeism schools (2-5%) achieving 80-90% math proficiency versus 35-68% for high-absenteeism schools (11-23%).
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