The Gwinnett County high schools with the best graduation rates

Georgia’s graduation rate reached an all-time high this year, data shows.

The rate grew 6 percentage points since last year to reach 78.8 percent.

Officials have attributed this increase to cleaner records, the retirement of the Georgia High School Graduation Test and new data systems that identify struggling kids early.

Despite the significant increase in the state's graduation rate, tens of thousands of students are still failing to earn a diploma.

Click here to learn the 2015 top 10 Georgia high school with the highest graduation rates.

The average graduation rate for 21 Gwinnett County high schools was 78 percent, up from 75 percent in 2014.

Gwinnett County high schools with the highest graduation rates in 2015

1. Gwinnett School of Mathematics, Science and Technology (94%)

2. Brookwood High School (93%)

2. North Gwinnett High School (93%)

Even though North Gwinnett and Brookwood both ranked second, Brookwood's graduation rate increases since 2014 while North Gwinnett's remained the same.

4. Parkview High School (91%)

4. Peachtree Ridge High School (91%)

ExploreClick here to see the complete list of Gwinnett County high school graduation rates.